Paper/patches/api/0006-Adventure.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Riley Park <rileysebastianpark@gmail.com>
Date: Fri, 29 Jan 2021 17:21:55 +0100
Subject: [PATCH] Adventure

Co-authored-by: zml <zml@stellardrift.ca>
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>

diff --git a/build.gradle.kts b/build.gradle.kts
index 41871b8a25798a98b856f1b0034016666216e28f..8324fa4b96ee6cf338e22d525f0d236df3a9addf 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -11,12 +11,28 @@ java {
 
 val annotationsVersion = "24.0.1"
 val bungeeCordChatVersion = "1.20-R0.1"
+val adventureVersion = "4.14.0"
+val apiAndDocs: Configuration by configurations.creating {
+    attributes {
+        attribute(Category.CATEGORY_ATTRIBUTE, objects.named(Category.DOCUMENTATION))
+        attribute(Bundling.BUNDLING_ATTRIBUTE, objects.named(Bundling.EXTERNAL))
+        attribute(DocsType.DOCS_TYPE_ATTRIBUTE, objects.named(DocsType.SOURCES))
+        attribute(Usage.USAGE_ATTRIBUTE, objects.named(Usage.JAVA_RUNTIME))
+    }
+}
+configurations.api {
+    extendsFrom(apiAndDocs)
+}
 
 dependencies {
     // api dependencies are listed transitively to API consumers
     api("com.google.guava:guava:32.1.2-jre")
     api("com.google.code.gson:gson:2.10.1")
-    api("net.md-5:bungeecord-chat:$bungeeCordChatVersion")
+    // Paper start - adventure
+    api("net.md-5:bungeecord-chat:$bungeeCordChatVersion-deprecated+build.14") {
+        exclude("com.google.guava", "guava")
+    }
+    // Paper - adventure
     api("org.yaml:snakeyaml:2.2")
     api("org.joml:joml:1.10.5")
     // Paper start
@@ -24,6 +40,13 @@ dependencies {
         isTransitive = false // includes junit
     }
     api("it.unimi.dsi:fastutil:8.5.6")
+    apiAndDocs(platform("net.kyori:adventure-bom:$adventureVersion"))
+    apiAndDocs("net.kyori:adventure-api")
+    apiAndDocs("net.kyori:adventure-text-minimessage")
+    apiAndDocs("net.kyori:adventure-text-serializer-gson")
+    apiAndDocs("net.kyori:adventure-text-serializer-legacy")
+    apiAndDocs("net.kyori:adventure-text-serializer-plain")
+    apiAndDocs("net.kyori:adventure-text-logger-slf4j")
     // Paper end
 
     compileOnly("org.apache.maven:maven-resolver-provider:3.8.5")
@@ -99,14 +122,30 @@ tasks.withType<Javadoc> {
         "https://guava.dev/releases/32.1.2-jre/api/docs/",
         "https://javadoc.io/doc/org.yaml/snakeyaml/2.2/",
         "https://javadoc.io/doc/org.jetbrains/annotations/$annotationsVersion/", // Paper - we don't want Java 5 annotations
-        "https://javadoc.io/doc/net.md-5/bungeecord-chat/$bungeeCordChatVersion/",
+        // "https://javadoc.io/doc/net.md-5/bungeecord-chat/$bungeeCordChatVersion/", // Paper - don't link to bungee chat
         // Paper start - add missing javadoc links
         "https://javadoc.io/doc/org.joml/joml/1.10.5/index.html",
         "https://www.javadoc.io/doc/com.google.code.gson/gson/2.10.1",
         // Paper end
+        // Paper start
+        "https://jd.advntr.dev/api/$adventureVersion/",
+        "https://jd.advntr.dev/text-minimessage/$adventureVersion/",
+        "https://jd.advntr.dev/text-serializer-gson/$adventureVersion/",
+        "https://jd.advntr.dev/text-serializer-legacy/$adventureVersion/",
+        "https://jd.advntr.dev/text-serializer-plain/$adventureVersion/",
+        "https://jd.advntr.dev/text-logger-slf4j/$adventureVersion/",
+        // Paper end
     )
     options.tags("apiNote:a:API Note:")
 
+    inputs.files(apiAndDocs).ignoreEmptyDirectories().withPropertyName(apiAndDocs.name + "-configuration")
+    doFirst {
+        options.addStringOption(
+            "sourcepath",
+            apiAndDocs.resolvedConfiguration.files.joinToString(separator = File.pathSeparator, transform = File::getPath)
+        )
+    }
+
     // workaround for https://github.com/gradle/gradle/issues/4046
     inputs.dir("src/main/javadoc").withPropertyName("javadoc-sourceset")
     doLast {
diff --git a/src/main/java/io/papermc/paper/chat/ChatRenderer.java b/src/main/java/io/papermc/paper/chat/ChatRenderer.java
new file mode 100644
index 0000000000000000000000000000000000000000..ffe0a921cc1ebbb95104f22b57e0e3af85e287a6
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chat/ChatRenderer.java
@@ -0,0 +1,71 @@
+package io.papermc.paper.chat;
+
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * A chat renderer is responsible for rendering chat messages sent by {@link Player}s to the server.
+ */
+@FunctionalInterface
+public interface ChatRenderer {
+    /**
+     * Renders a chat message. This will be called once for each receiving {@link Audience}.
+     *
+     * @param source the message source
+     * @param sourceDisplayName the display name of the source player
+     * @param message the chat message
+     * @param viewer the receiving {@link Audience}
+     * @return a rendered chat message
+     */
+    @ApiStatus.OverrideOnly
+    @NotNull
+    Component render(@NotNull Player source, @NotNull Component sourceDisplayName, @NotNull Component message, @NotNull Audience viewer);
+
+    /**
+     * Create a new instance of the default {@link ChatRenderer}.
+     *
+     * @return a new {@link ChatRenderer}
+     */
+    @NotNull
+    static ChatRenderer defaultRenderer() {
+        return new ViewerUnawareImpl.Default((source, sourceDisplayName, message) -> Component.translatable("chat.type.text", sourceDisplayName, message));
+    }
+
+    @ApiStatus.Internal
+    sealed interface Default extends ChatRenderer, ViewerUnaware permits ViewerUnawareImpl.Default {
+    }
+
+    /**
+     * Creates a new viewer-unaware {@link ChatRenderer}, which will render the chat message a single time,
+     * displaying the same rendered message to every viewing {@link Audience}.
+     *
+     * @param renderer the viewer unaware renderer
+     * @return a new {@link ChatRenderer}
+     */
+    @NotNull
+    static ChatRenderer viewerUnaware(final @NotNull ViewerUnaware renderer) {
+        return new ViewerUnawareImpl(renderer);
+    }
+
+    /**
+     * Similar to {@link ChatRenderer}, but without knowledge of the message viewer.
+     *
+     * @see ChatRenderer#viewerUnaware(ViewerUnaware)
+     */
+    interface ViewerUnaware {
+        /**
+         * Renders a chat message.
+         *
+         * @param source the message source
+         * @param sourceDisplayName the display name of the source player
+         * @param message the chat message
+         * @return a rendered chat message
+         */
+        @ApiStatus.OverrideOnly
+        @NotNull
+        Component render(@NotNull Player source, @NotNull Component sourceDisplayName, @NotNull Component message);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/chat/ViewerUnawareImpl.java b/src/main/java/io/papermc/paper/chat/ViewerUnawareImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..2ad76b1751ba707f7ae0d283aa1cbaf6c9619da9
--- /dev/null
+++ b/src/main/java/io/papermc/paper/chat/ViewerUnawareImpl.java
@@ -0,0 +1,35 @@
+package io.papermc.paper.chat;
+
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+sealed class ViewerUnawareImpl implements ChatRenderer, ChatRenderer.ViewerUnaware permits ViewerUnawareImpl.Default {
+    private final ViewerUnaware unaware;
+    private @Nullable Component message;
+
+    ViewerUnawareImpl(final ViewerUnaware unaware) {
+        this.unaware = unaware;
+    }
+
+    @Override
+    public @NotNull Component render(final @NotNull Player source, final @NotNull Component sourceDisplayName, final @NotNull Component message, final @NotNull Audience viewer) {
+        return this.render(source, sourceDisplayName, message);
+    }
+
+    @Override
+    public @NotNull Component render(final @NotNull Player source, final @NotNull Component sourceDisplayName, final @NotNull Component message) {
+        if (this.message == null) {
+            this.message = this.unaware.render(source, sourceDisplayName, message);
+        }
+        return this.message;
+    }
+
+    static final class Default extends ViewerUnawareImpl implements ChatRenderer.Default {
+        Default(final ViewerUnaware unaware) {
+            super(unaware);
+        }
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/AbstractChatEvent.java b/src/main/java/io/papermc/paper/event/player/AbstractChatEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..ed8e885f226b02b9875b23ae2294a9056d2e8b29
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/AbstractChatEvent.java
@@ -0,0 +1,125 @@
+package io.papermc.paper.event.player;
+
+import io.papermc.paper.chat.ChatRenderer;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.chat.SignedMessage;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Set;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * An abstract implementation of a chat event, handling shared logic.
+ */
+@ApiStatus.NonExtendable
+public abstract class AbstractChatEvent extends PlayerEvent implements Cancellable {
+    private final Set<Audience> viewers;
+    private final Component originalMessage;
+    private final SignedMessage signedMessage;
+    private ChatRenderer renderer;
+    private Component message;
+    private boolean cancelled = false;
+
+    AbstractChatEvent(final boolean async, final @NotNull Player player, final @NotNull Set<Audience> viewers, final @NotNull ChatRenderer renderer, final @NotNull Component message, final @NotNull Component originalMessage, final @NotNull SignedMessage signedMessage) {
+        super(player, async);
+        this.viewers = viewers;
+        this.renderer = renderer;
+        this.message = message;
+        this.originalMessage = originalMessage;
+        this.signedMessage = signedMessage;
+    }
+
+    /**
+     * Gets a set of {@link Audience audiences} that this chat message will be displayed to.
+     *
+     * <p>The set returned may auto-populate on access. Any listener accessing the returned set should be aware that
+     * it may reduce performance for a lazy set implementation.</p>
+     *
+     * @return a mutable set of {@link Audience audiences} who will receive the chat message
+     */
+    @NotNull
+    public final Set<Audience> viewers() {
+        return this.viewers;
+    }
+
+    /**
+     * Sets the chat renderer.
+     *
+     * @param renderer the chat renderer
+     * @throws NullPointerException if {@code renderer} is {@code null}
+     */
+    public final void renderer(final @NotNull ChatRenderer renderer) {
+        this.renderer = requireNonNull(renderer, "renderer");
+    }
+
+    /**
+     * Gets the chat renderer.
+     *
+     * @return the chat renderer
+     */
+    @NotNull
+    public final ChatRenderer renderer() {
+        return this.renderer;
+    }
+
+    /**
+     * Gets the user-supplied message.
+     * The return value will reflect changes made using {@link #message(Component)}.
+     *
+     * @return the user-supplied message
+     */
+    @NotNull
+    public final Component message() {
+        return this.message;
+    }
+
+    /**
+     * Sets the user-supplied message.
+     *
+     * @param message the user-supplied message
+     * @throws NullPointerException if {@code message} is {@code null}
+     */
+    public final void message(final @NotNull Component message) {
+        this.message = requireNonNull(message, "message");
+    }
+
+    /**
+     * Gets the original and unmodified user-supplied message.
+     * The return value will <b>not</b> reflect changes made using
+     * {@link #message(Component)}.
+     *
+     * @return the original user-supplied message
+     */
+    @NotNull
+    public final Component originalMessage() {
+        return this.originalMessage;
+    }
+
+    /**
+     * Gets the signed message.
+     * Changes made in this event will <b>not</b> update
+     * the signed message.
+     *
+     * @return the signed message
+     */
+    @NotNull
+    public final SignedMessage signedMessage() {
+        return this.signedMessage;
+    }
+
+    @Override
+    public final boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public final void setCancelled(final boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/AsyncChatCommandDecorateEvent.java b/src/main/java/io/papermc/paper/event/player/AsyncChatCommandDecorateEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..feece00981ebf932e64760e7a10a04ad080d0228
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/AsyncChatCommandDecorateEvent.java
@@ -0,0 +1,28 @@
+package io.papermc.paper.event.player;
+
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+@ApiStatus.Experimental
+public class AsyncChatCommandDecorateEvent extends AsyncChatDecorateEvent {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    @ApiStatus.Internal
+    public AsyncChatCommandDecorateEvent(boolean async, @Nullable Player player, @NotNull Component originalMessage, @NotNull Component result) {
+        super(async, player, originalMessage, result);
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static @NotNull HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/AsyncChatDecorateEvent.java b/src/main/java/io/papermc/paper/event/player/AsyncChatDecorateEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..667bfa6afc35f8a8f475431171ee474af4e10afd
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/AsyncChatDecorateEvent.java
@@ -0,0 +1,117 @@
+package io.papermc.paper.event.player;
+
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.server.ServerEvent;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * This event is fired when the server decorates a component for chat purposes. This is called
+ * before {@link AsyncChatEvent} and the other chat events. It is recommended that you modify the
+ * message here, and use the chat events for modifying receivers and later the chat type. If you
+ * want to keep the message as "signed" for the clients who get it, be sure to include the entire
+ * original message somewhere in the final message.
+ * @see AsyncChatCommandDecorateEvent for the decoration of messages sent via commands
+ */
+@ApiStatus.Experimental
+public class AsyncChatDecorateEvent extends ServerEvent implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final Player player;
+    private final Component originalMessage;
+    private Component result;
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public AsyncChatDecorateEvent(final boolean async, final @Nullable Player player, final @NotNull Component originalMessage, final @NotNull Component result) {
+        super(async);
+        this.player = player;
+        this.originalMessage = originalMessage;
+        this.result = result;
+    }
+
+    /**
+     * Gets the player (if available) associated with this event.
+     * <p>
+     * Certain commands request decorations without a player context
+     * which is why this is possibly null.
+     *
+     * @return the player or null
+     */
+    public @Nullable Player player() {
+        return this.player;
+    }
+
+    /**
+     * Gets the original decoration input
+     *
+     * @return the input
+     */
+    public @NotNull Component originalMessage() {
+        return this.originalMessage;
+    }
+
+    /**
+     * Gets the decoration result. This may already be different from
+     * {@link #originalMessage()} if some other listener to this event
+     * <b>OR</b> the legacy preview event ({@link org.bukkit.event.player.AsyncPlayerChatPreviewEvent}
+     * changed the result.
+     *
+     * @return the result
+     */
+    public @NotNull Component result() {
+        return this.result;
+    }
+
+    /**
+     * Sets the resulting decorated component.
+     *
+     * @param result the result
+     */
+    public void result(@NotNull Component result) {
+        this.result = result;
+    }
+
+    /**
+     * If this decorating is part of a preview request/response.
+     *
+     * @return true if part of previewing
+     * @deprecated chat preview was removed in 1.19.3
+     */
+    @Deprecated(forRemoval = true)
+    @ApiStatus.ScheduledForRemoval(inVersion = "1.21")
+    @Contract(value = "-> false", pure = true)
+    public boolean isPreview() {
+        return false;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    /**
+     * A cancelled decorating event means that no changes to the result component
+     * will have any effect. The decorated component will be equal to the original
+     * component.
+     */
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static @NotNull HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/AsyncChatEvent.java b/src/main/java/io/papermc/paper/event/player/AsyncChatEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..4eada40b8abb1833ce623ccee0789555e370d024
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/AsyncChatEvent.java
@@ -0,0 +1,37 @@
+package io.papermc.paper.event.player;
+
+import java.util.Set;
+import io.papermc.paper.chat.ChatRenderer;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.chat.SignedMessage;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An event fired when a {@link Player} sends a chat message to the server.
+ */
+public final class AsyncChatEvent extends AbstractChatEvent {
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    /**
+     * @param viewers A mutable set of viewers
+     */
+    @ApiStatus.Internal
+    public AsyncChatEvent(final boolean async, final @NotNull Player player, final @NotNull Set<Audience> viewers, final @NotNull ChatRenderer renderer, final @NotNull Component message, final @NotNull Component originalMessage, final @NotNull SignedMessage signedMessage) {
+        super(async, player, viewers, renderer, message, originalMessage, signedMessage);
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/event/player/ChatEvent.java b/src/main/java/io/papermc/paper/event/player/ChatEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..af025704e978dc0b11be277ab4646da77eb3a60b
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/player/ChatEvent.java
@@ -0,0 +1,42 @@
+package io.papermc.paper.event.player;
+
+import java.util.Set;
+import io.papermc.paper.chat.ChatRenderer;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.chat.SignedMessage;
+import net.kyori.adventure.text.Component;
+import org.bukkit.Warning;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An event fired when a {@link Player} sends a chat message to the server.
+ *
+ * @deprecated Listening to this event forces chat to wait for the main thread, delaying chat messages. It is recommended to use {@link AsyncChatEvent} instead, wherever possible.
+ */
+@Deprecated
+@Warning(reason = "Listening to this event forces chat to wait for the main thread, delaying chat messages.")
+public final class ChatEvent extends AbstractChatEvent {
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    /**
+     * @param viewers A mutable set of viewers
+     */
+    @ApiStatus.Internal
+    public ChatEvent(final @NotNull Player player, final @NotNull Set<Audience> viewers, final @NotNull ChatRenderer renderer, final @NotNull Component message, final @NotNull Component originalMessage, final @NotNull SignedMessage signedMessage) {
+        super(false, player, viewers, renderer, message, originalMessage, signedMessage);
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/text/PaperComponents.java b/src/main/java/io/papermc/paper/text/PaperComponents.java
new file mode 100644
index 0000000000000000000000000000000000000000..6e94562d79206d88b74b53814f9423f12a2e6e06
--- /dev/null
+++ b/src/main/java/io/papermc/paper/text/PaperComponents.java
@@ -0,0 +1,177 @@
+package io.papermc.paper.text;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.flattener.ComponentFlattener;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Entity;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.IOException;
+
+/**
+ * Paper API-specific methods for working with {@link Component}s and related.
+ */
+public final class PaperComponents {
+    private PaperComponents() {
+        throw new RuntimeException("PaperComponents is not to be instantiated!");
+    }
+
+    /**
+     * Resolves a component with a specific command sender and subject.
+     * <p>
+     * Note that in Vanilla, elevated permissions are usually required to use
+     * '@' selectors in various component types, but this method should not
+     * check such permissions from the sender.
+     * <p>
+     * A {@link CommandSender} argument is required to resolve:
+     * <ul>
+     *     <li>{@link net.kyori.adventure.text.NBTComponent}</li>
+     *     <li>{@link net.kyori.adventure.text.ScoreComponent}</li>
+     *     <li>{@link net.kyori.adventure.text.SelectorComponent}</li>
+     * </ul>
+     * A {@link Entity} argument is optional to help resolve:
+     * <ul>
+     *     <li>{@link net.kyori.adventure.text.ScoreComponent}</li>
+     * </ul>
+     * {@link net.kyori.adventure.text.TranslatableComponent}s don't require any extra arguments.
+     *
+     * @param input the component to resolve
+     * @param context the command sender to resolve with
+     * @param scoreboardSubject the scoreboard subject to use (for use with {@link net.kyori.adventure.text.ScoreComponent}s)
+     * @return the resolved component
+     * @throws IOException if a syntax error tripped during resolving
+     */
+    public static @NotNull Component resolveWithContext(@NotNull Component input, @Nullable CommandSender context, @Nullable Entity scoreboardSubject) throws IOException {
+        return resolveWithContext(input, context, scoreboardSubject, true);
+    }
+
+    /**
+     * Resolves a component with a specific command sender and subject.
+     * <p>
+     * Note that in Vanilla, elevated permissions are required to use
+     * '@' selectors in various component types. If the boolean {@code bypassPermissions}
+     * argument is {@code false}, the {@link CommandSender} argument will be used to query
+     * those permissions.
+     * <p>
+     * A {@link CommandSender} argument is required to resolve:
+     * <ul>
+     *     <li>{@link net.kyori.adventure.text.NBTComponent}</li>
+     *     <li>{@link net.kyori.adventure.text.ScoreComponent}</li>
+     *     <li>{@link net.kyori.adventure.text.SelectorComponent}</li>
+     * </ul>
+     * A {@link Entity} argument is optional to help resolve:
+     * <ul>
+     *     <li>{@link net.kyori.adventure.text.ScoreComponent}</li>
+     * </ul>
+     * {@link net.kyori.adventure.text.TranslatableComponent}s don't require any extra arguments.
+     *
+     * @param input the component to resolve
+     * @param context the command sender to resolve with
+     * @param scoreboardSubject the scoreboard subject to use (for use with {@link net.kyori.adventure.text.ScoreComponent}s)
+     * @param bypassPermissions true to bypass permissions checks for resolving components
+     * @return the resolved component
+     * @throws IOException if a syntax error tripped during resolving
+     */
+    public static @NotNull Component resolveWithContext(@NotNull Component input, @Nullable CommandSender context, @Nullable Entity scoreboardSubject, boolean bypassPermissions) throws IOException {
+        return Bukkit.getUnsafe().resolveWithContext(input, context, scoreboardSubject, bypassPermissions);
+    }
+
+    /**
+     * Return a component flattener that can use game data to resolve extra information about components.
+     *
+     * @return a component flattener
+     */
+    public static @NotNull ComponentFlattener flattener() {
+        return Bukkit.getUnsafe().componentFlattener();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert components to
+     * a plain-text string.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires access to implementation details.</p>
+     *
+     * @return a serializer to plain text
+     * @deprecated will be removed in adventure 5.0.0, use {@link PlainTextComponentSerializer#plainText()}
+     */
+    @Deprecated(forRemoval = true)
+    public static @NotNull PlainComponentSerializer plainSerializer() {
+        return Bukkit.getUnsafe().plainComponentSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert components to
+     * a plain-text string.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires access to implementation details.</p>
+     *
+     * @return a serializer to plain text
+     * @deprecated use {@link PlainTextComponentSerializer#plainText()}
+     */
+    @Deprecated(forRemoval = true)
+    public static @NotNull PlainTextComponentSerializer plainTextSerializer() {
+        return Bukkit.getUnsafe().plainTextSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert to and from the
+     * standard JSON serialization format using Gson.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires implementation details, such as legacy
+     * (pre-1.16) hover events.</p>
+     *
+     * @return a json component serializer
+     * @deprecated use {@link GsonComponentSerializer#gson()}
+     */
+    @Deprecated(forRemoval = true)
+    public static @NotNull GsonComponentSerializer gsonSerializer() {
+        return Bukkit.getUnsafe().gsonComponentSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert to and from the
+     * standard JSON serialization format using Gson, downsampling any RGB colors
+     * to their nearest {@link NamedTextColor} counterpart.
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires implementation details, such as legacy
+     * (pre-1.16) hover events.</p>
+     *
+     * @return a json component serializer
+     * @deprecated use {@link GsonComponentSerializer#colorDownsamplingGson()}
+     */
+    @Deprecated(forRemoval = true)
+    public static @NotNull GsonComponentSerializer colorDownsamplingGsonSerializer() {
+        return Bukkit.getUnsafe().colorDownsamplingGsonComponentSerializer();
+    }
+
+    /**
+     * Get a serializer for {@link Component}s that will convert to and from the
+     * legacy component format used by Bukkit. This serializer uses the
+     * {@link LegacyComponentSerializer.Builder#useUnusualXRepeatedCharacterHexFormat()}
+     * option to match upstream behavior.
+     *
+     * <p>This legacy serializer uses the standard section symbol to mark
+     * formatting characters.</p>
+     *
+     * <p>Implementations may provide a serializer capable of processing any
+     * information that requires access to implementation details.</p>
+     *
+     * @return a section serializer
+     * @deprecated use {@link LegacyComponentSerializer#legacySection()}
+     */
+    @Deprecated(forRemoval = true)
+    public static @NotNull LegacyComponentSerializer legacySectionSerializer() {
+        return Bukkit.getUnsafe().legacyComponentSerializer();
+    }
+}
diff --git a/src/main/java/org/bukkit/Bukkit.java b/src/main/java/org/bukkit/Bukkit.java
index ea881e5b8fcde8768bd884fde737d38f6ee07a5f..0272b699bd2351511856fe116162a965e928ebc0 100644
--- a/src/main/java/org/bukkit/Bukkit.java
+++ b/src/main/java/org/bukkit/Bukkit.java
@@ -390,7 +390,9 @@ public final class Bukkit {
      *
      * @param message the message
      * @return the number of players
+     * @deprecated in favour of {@link Server#broadcast(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public static int broadcastMessage(@NotNull String message) {
         return server.broadcastMessage(message);
     }
@@ -1181,6 +1183,19 @@ public final class Bukkit {
         server.shutdown();
     }
 
+    // Paper start
+    /**
+     * Broadcast a message to all players.
+     * <p>
+     * This is the same as calling {@link #broadcast(net.kyori.adventure.text.Component,
+     * java.lang.String)} with the {@link Server#BROADCAST_CHANNEL_USERS} permission.
+     *
+     * @param message the message
+     * @return the number of players
+     */
+    public static int broadcast(net.kyori.adventure.text.@NotNull Component message) {
+        return server.broadcast(message);
+    }
     /**
      * Broadcasts the specified message to every user with the given
      * permission name.
@@ -1190,6 +1205,21 @@ public final class Bukkit {
      *     permissibles} must have to receive the broadcast
      * @return number of message recipients
      */
+    public static int broadcast(net.kyori.adventure.text.@NotNull Component message, @NotNull String permission) {
+        return server.broadcast(message, permission);
+    }
+    // Paper end
+    /**
+     * Broadcasts the specified message to every user with the given
+     * permission name.
+     *
+     * @param message message to broadcast
+     * @param permission the required permission {@link Permissible
+     *     permissibles} must have to receive the broadcast
+     * @return number of message recipients
+     * @deprecated in favour of {@link #broadcast(net.kyori.adventure.text.Component, String)}
+     */
+    @Deprecated // Paper
     public static int broadcast(@NotNull String message, @NotNull String permission) {
         return server.broadcast(message, permission);
     }
@@ -1451,6 +1481,7 @@ public final class Bukkit {
         return server.createInventory(owner, type);
     }
 
+    // Paper start
     /**
      * Creates an empty inventory with the specified type and title. If the type
      * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
@@ -1476,6 +1507,38 @@ public final class Bukkit {
      * @see InventoryType#isCreatable()
      */
     @NotNull
+    public static Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, net.kyori.adventure.text.@NotNull Component title) {
+        return server.createInventory(owner, type, title);
+    }
+    // Paper end
+
+    /**
+     * Creates an empty inventory with the specified type and title. If the type
+     * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
+     * otherwise the new inventory has the normal size for its type.<br>
+     * It should be noted that some inventory types do not support titles and
+     * may not render with said titles on the Minecraft client.
+     * <br>
+     * {@link InventoryType#WORKBENCH} will not process crafting recipes if
+     * created with this method. Use
+     * {@link Player#openWorkbench(Location, boolean)} instead.
+     * <br>
+     * {@link InventoryType#ENCHANTING} will not process {@link ItemStack}s
+     * for possible enchanting results. Use
+     * {@link Player#openEnchanting(Location, boolean)} instead.
+     *
+     * @param owner The holder of the inventory; can be null if there's no holder.
+     * @param type The type of inventory to create.
+     * @param title The title of the inventory, to be displayed when it is viewed.
+     * @return The new inventory.
+     * @throws IllegalArgumentException if the {@link InventoryType} cannot be
+     * viewed.
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, InventoryType, net.kyori.adventure.text.Component)}
+     *
+     * @see InventoryType#isCreatable()
+     */
+    @Deprecated // Paper
+    @NotNull
     public static Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, @NotNull String title) {
         return server.createInventory(owner, type, title);
     }
@@ -1494,6 +1557,7 @@ public final class Bukkit {
         return server.createInventory(owner, size);
     }
 
+    // Paper start
     /**
      * Creates an empty inventory of type {@link InventoryType#CHEST} with the
      * specified size and title.
@@ -1506,10 +1570,30 @@ public final class Bukkit {
      * @throws IllegalArgumentException if the size is not a multiple of 9
      */
     @NotNull
+    public static Inventory createInventory(@Nullable InventoryHolder owner, int size, net.kyori.adventure.text.@NotNull Component title) throws IllegalArgumentException {
+        return server.createInventory(owner, size, title);
+    }
+    // Paper end
+
+    /**
+     * Creates an empty inventory of type {@link InventoryType#CHEST} with the
+     * specified size and title.
+     *
+     * @param owner the holder of the inventory, or null to indicate no holder
+     * @param size a multiple of 9 as the size of inventory to create
+     * @param title the title of the inventory, displayed when inventory is
+     *     viewed
+     * @return a new inventory
+     * @throws IllegalArgumentException if the size is not a multiple of 9
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, InventoryType, net.kyori.adventure.text.Component)}
+     */
+    @Deprecated // Paper
+    @NotNull
     public static Inventory createInventory(@Nullable InventoryHolder owner, int size, @NotNull String title) throws IllegalArgumentException {
         return server.createInventory(owner, size, title);
     }
 
+    // Paper start
     /**
      * Creates an empty merchant.
      *
@@ -1517,7 +1601,20 @@ public final class Bukkit {
      * when the merchant inventory is viewed
      * @return a new merchant
      */
+    public static @NotNull Merchant createMerchant(net.kyori.adventure.text.@Nullable Component title) {
+        return server.createMerchant(title);
+    }
+    // Paper start
+    /**
+     * Creates an empty merchant.
+     *
+     * @param title the title of the corresponding merchant inventory, displayed
+     * when the merchant inventory is viewed
+     * @return a new merchant
+     * @deprecated in favour of {@link #createMerchant(net.kyori.adventure.text.Component)}
+     */
     @NotNull
+    @Deprecated // Paper
     public static Merchant createMerchant(@Nullable String title) {
         return server.createMerchant(title);
     }
@@ -1634,12 +1731,43 @@ public final class Bukkit {
         return server.isPrimaryThread();
     }
 
+    // Paper start
+    /**
+     * Gets the message that is displayed on the server list.
+     *
+     * @return the server's MOTD
+     */
+    @NotNull public static net.kyori.adventure.text.Component motd() {
+        return server.motd();
+    }
+
+    /**
+     * Set the message that is displayed on the server list.
+     *
+     * @param motd The message to be displayed
+     */
+    public static void motd(final net.kyori.adventure.text.@NotNull Component motd) {
+        server.motd(motd);
+    }
+
+    /**
+     * Gets the default message that is displayed when the server is stopped.
+     *
+     * @return the shutdown message
+     */
+    public static net.kyori.adventure.text.@Nullable Component shutdownMessage() {
+        return server.shutdownMessage();
+    }
+    // Paper end
+
     /**
      * Gets the message that is displayed on the server list.
      *
      * @return the servers MOTD
+     * @deprecated in favour of {@link #motd()}
      */
     @NotNull
+    @Deprecated // Paper
     public static String getMotd() {
         return server.getMotd();
     }
@@ -1648,7 +1776,9 @@ public final class Bukkit {
      * Set the message that is displayed on the server list.
      *
      * @param motd The message to be displayed
+     * @deprecated in favour of {@link #motd(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public static void setMotd(@NotNull String motd) {
         server.setMotd(motd);
     }
@@ -1657,8 +1787,10 @@ public final class Bukkit {
      * Gets the default message that is displayed when the server is stopped.
      *
      * @return the shutdown message
+     * @deprecated in favour of {@link #shutdownMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public static String getShutdownMessage() {
         return server.getShutdownMessage();
     }
diff --git a/src/main/java/org/bukkit/ChatColor.java b/src/main/java/org/bukkit/ChatColor.java
index e3f185dc982d1c38195a4e01ddd485c13ffa58c0..918a045165cdcde264bc24082b7afebb407271de 100644
--- a/src/main/java/org/bukkit/ChatColor.java
+++ b/src/main/java/org/bukkit/ChatColor.java
@@ -10,7 +10,9 @@ import org.jetbrains.annotations.Nullable;
 
 /**
  * All supported color values for chat
+ * @deprecated ChatColor has been deprecated in favor of <a href="https://docs.advntr.dev/text.html">Adventure</a> API. See {@link net.kyori.adventure.text.format.NamedTextColor} for the adventure equivalent of pre-defined text colors
  */
+@Deprecated // Paper
 public enum ChatColor {
     /**
      * Represents black
diff --git a/src/main/java/org/bukkit/Keyed.java b/src/main/java/org/bukkit/Keyed.java
index 32c92621c2c15eec14c50965f5ecda00c46e6c80..e076d447da62445764a9776ee2554c077637d270 100644
--- a/src/main/java/org/bukkit/Keyed.java
+++ b/src/main/java/org/bukkit/Keyed.java
@@ -5,7 +5,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * Represents an object which has a {@link NamespacedKey} attached to it.
  */
-public interface Keyed {
+public interface Keyed extends net.kyori.adventure.key.Keyed { // Paper -- extend Adventure Keyed
 
     /**
      * Return the namespaced identifier for this object.
@@ -14,4 +14,16 @@ public interface Keyed {
      */
     @NotNull
     NamespacedKey getKey();
+
+    // Paper start
+    /**
+     * Returns the unique identifier for this object.
+     *
+     * @return this object's key
+     */
+    @Override
+    default net.kyori.adventure.key.@NotNull Key key() {
+        return this.getKey();
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/Nameable.java b/src/main/java/org/bukkit/Nameable.java
index b79daa857fc686f00ac06b8851e0ab68d83ae949..45d996878ba8d314a47078589b6da59dc84d589e 100644
--- a/src/main/java/org/bukkit/Nameable.java
+++ b/src/main/java/org/bukkit/Nameable.java
@@ -7,6 +7,30 @@ import org.jetbrains.annotations.Nullable;
  */
 public interface Nameable {
 
+    // Paper start
+    /**
+     * Gets the custom name.
+     *
+     * <p>This value has no effect on players, they will always use their real name.</p>
+     *
+     * @return the custom name
+     */
+    net.kyori.adventure.text.@Nullable Component customName();
+
+    /**
+     * Sets the custom name.
+     *
+     * <p>This name will be used in death messages and can be sent to the client as a nameplate over the mob.</p>
+     *
+     * <p>Setting the name to {@code null} will clear it.</p>
+     *
+     * <p>This value has no effect on players, they will always use their real name.</p>
+     *
+     * @param customName the custom name to set
+     */
+    void customName(final net.kyori.adventure.text.@Nullable Component customName);
+    // Paper end
+
     /**
      * Gets the custom name on a mob or block. If there is no name this method
      * will return null.
@@ -14,8 +38,10 @@ public interface Nameable {
      * This value has no effect on players, they will always use their real
      * name.
      *
+     * @deprecated in favour of {@link #customName()}
      * @return name of the mob/block or null
      */
+    @Deprecated // Paper
     @Nullable
     public String getCustomName();
 
@@ -28,7 +54,9 @@ public interface Nameable {
      * This value has no effect on players, they will always use their real
      * name.
      *
+     * @deprecated in favour of {@link #customName(net.kyori.adventure.text.Component)}
      * @param name the name to set
      */
+    @Deprecated // Paper
     public void setCustomName(@Nullable String name);
 }
diff --git a/src/main/java/org/bukkit/NamespacedKey.java b/src/main/java/org/bukkit/NamespacedKey.java
index ae7b51341fb66c41b8a7c4604fd273d876e311be..4034fcb9abc39b12f0de47c4b679f2ef82353c89 100644
--- a/src/main/java/org/bukkit/NamespacedKey.java
+++ b/src/main/java/org/bukkit/NamespacedKey.java
@@ -19,7 +19,7 @@ import org.jetbrains.annotations.Nullable;
  * underscores, hyphens, and forward slashes.
  *
  */
-public final class NamespacedKey {
+public final class NamespacedKey implements net.kyori.adventure.key.Key { // Paper - implement Key
 
     /**
      * The namespace representing all inbuilt keys.
@@ -130,10 +130,11 @@ public final class NamespacedKey {
 
     @Override
     public int hashCode() {
-        int hash = 5;
-        hash = 47 * hash + this.namespace.hashCode();
-        hash = 47 * hash + this.key.hashCode();
-        return hash;
+        // Paper start
+        int result = this.namespace.hashCode();
+        result = (31 * result) + this.key.hashCode();
+        return result;
+        // Paper end
     }
 
     @Override
@@ -141,11 +142,10 @@ public final class NamespacedKey {
         if (obj == null) {
             return false;
         }
-        if (getClass() != obj.getClass()) {
-            return false;
-        }
-        final NamespacedKey other = (NamespacedKey) obj;
-        return this.namespace.equals(other.namespace) && this.key.equals(other.key);
+        // Paper start
+        if (!(obj instanceof net.kyori.adventure.key.Key key)) return false;
+        return this.namespace.equals(key.namespace()) && this.key.equals(key.value());
+        // Paper end
     }
 
     @Override
@@ -247,4 +247,24 @@ public final class NamespacedKey {
     public static NamespacedKey fromString(@NotNull String key) {
         return fromString(key, null);
     }
+
+    // Paper start
+    @NotNull
+    @Override
+    public String namespace() {
+        return this.getNamespace();
+    }
+
+    @NotNull
+    @Override
+    public String value() {
+        return this.getKey();
+    }
+
+    @NotNull
+    @Override
+    public String asString() {
+        return this.namespace + ':' + this.key;
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/Server.java b/src/main/java/org/bukkit/Server.java
index 0f38cffd9d858eb3b959d30388e82a77af913ecb..be29b60651f0ab9cae4e0a3ff1df4e8b0422a947 100644
--- a/src/main/java/org/bukkit/Server.java
+++ b/src/main/java/org/bukkit/Server.java
@@ -62,13 +62,13 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a server implementation.
  */
-public interface Server extends PluginMessageRecipient {
+public interface Server extends PluginMessageRecipient, net.kyori.adventure.audience.ForwardingAudience { // Paper
 
     /**
      * Used for all administrative messages, such as an operator using a
      * command.
      * <p>
-     * For use in {@link #broadcast(java.lang.String, java.lang.String)}.
+     * For use in {@link #broadcast(net.kyori.adventure.text.Component, java.lang.String)}.
      */
     public static final String BROADCAST_CHANNEL_ADMINISTRATIVE = "bukkit.broadcast.admin";
 
@@ -76,7 +76,7 @@ public interface Server extends PluginMessageRecipient {
      * Used for all announcement messages, such as informing users that a
      * player has joined.
      * <p>
-     * For use in {@link #broadcast(java.lang.String, java.lang.String)}.
+     * For use in {@link #broadcast(net.kyori.adventure.text.Component, java.lang.String)}.
      */
     public static final String BROADCAST_CHANNEL_USERS = "bukkit.broadcast.user";
 
@@ -329,7 +329,9 @@ public interface Server extends PluginMessageRecipient {
      *
      * @param message the message
      * @return the number of players
+     * @deprecated use {@link #broadcast(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public int broadcastMessage(@NotNull String message);
 
     /**
@@ -1015,8 +1017,33 @@ public interface Server extends PluginMessageRecipient {
      * @param permission the required permission {@link Permissible
      *     permissibles} must have to receive the broadcast
      * @return number of message recipients
+     * @deprecated in favour of {@link #broadcast(net.kyori.adventure.text.Component, String)}
      */
+    @Deprecated // Paper
     public int broadcast(@NotNull String message, @NotNull String permission);
+    // Paper start
+    /**
+     * Broadcast a message to all players.
+     * <p>
+     * This is the same as calling {@link #broadcast(net.kyori.adventure.text.Component,
+     * java.lang.String)} with the {@link #BROADCAST_CHANNEL_USERS} permission.
+     *
+     * @param message the message
+     * @return the number of players
+     */
+    int broadcast(net.kyori.adventure.text.@NotNull Component message);
+
+    /**
+     * Broadcasts the specified message to every user with the given
+     * permission name.
+     *
+     * @param message message to broadcast
+     * @param permission the required permission {@link Permissible
+     *     permissibles} must have to receive the broadcast
+     * @return number of message recipients
+     */
+    int broadcast(net.kyori.adventure.text.@NotNull Component message, @NotNull String permission);
+    // Paper end
 
     /**
      * Gets the player by the given name, regardless if they are offline or
@@ -1233,6 +1260,35 @@ public interface Server extends PluginMessageRecipient {
     @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type);
 
+    // Paper start
+    /**
+     * Creates an empty inventory with the specified type and title. If the type
+     * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
+     * otherwise the new inventory has the normal size for its type.<br>
+     * It should be noted that some inventory types do not support titles and
+     * may not render with said titles on the Minecraft client.
+     * <br>
+     * {@link InventoryType#WORKBENCH} will not process crafting recipes if
+     * created with this method. Use
+     * {@link Player#openWorkbench(Location, boolean)} instead.
+     * <br>
+     * {@link InventoryType#ENCHANTING} will not process {@link ItemStack}s
+     * for possible enchanting results. Use
+     * {@link Player#openEnchanting(Location, boolean)} instead.
+     *
+     * @param owner The holder of the inventory; can be null if there's no holder.
+     * @param type The type of inventory to create.
+     * @param title The title of the inventory, to be displayed when it is viewed.
+     * @return The new inventory.
+     * @throws IllegalArgumentException if the {@link InventoryType} cannot be
+     * viewed.
+     *
+     * @see InventoryType#isCreatable()
+     */
+    @NotNull
+    Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, net.kyori.adventure.text.@NotNull Component title);
+    // Paper end
+
     /**
      * Creates an empty inventory with the specified type and title. If the type
      * is {@link InventoryType#CHEST}, the new inventory has a size of 27;
@@ -1254,9 +1310,11 @@ public interface Server extends PluginMessageRecipient {
      * @return The new inventory.
      * @throws IllegalArgumentException if the {@link InventoryType} cannot be
      * viewed.
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, InventoryType, net.kyori.adventure.text.Component)}
      *
      * @see InventoryType#isCreatable()
      */
+    @Deprecated // Paper
     @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, @NotNull InventoryType type, @NotNull String title);
 
@@ -1272,6 +1330,22 @@ public interface Server extends PluginMessageRecipient {
     @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, int size) throws IllegalArgumentException;
 
+    // Paper start
+    /**
+     * Creates an empty inventory of type {@link InventoryType#CHEST} with the
+     * specified size and title.
+     *
+     * @param owner the holder of the inventory, or null to indicate no holder
+     * @param size a multiple of 9 as the size of inventory to create
+     * @param title the title of the inventory, displayed when inventory is
+     *     viewed
+     * @return a new inventory
+     * @throws IllegalArgumentException if the size is not a multiple of 9
+     */
+    @NotNull
+    Inventory createInventory(@Nullable InventoryHolder owner, int size, net.kyori.adventure.text.@NotNull Component title) throws IllegalArgumentException;
+    // Paper end
+
     /**
      * Creates an empty inventory of type {@link InventoryType#CHEST} with the
      * specified size and title.
@@ -1282,18 +1356,32 @@ public interface Server extends PluginMessageRecipient {
      *     viewed
      * @return a new inventory
      * @throws IllegalArgumentException if the size is not a multiple of 9
+     * @deprecated in favour of {@link #createInventory(InventoryHolder, int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     @NotNull
     Inventory createInventory(@Nullable InventoryHolder owner, int size, @NotNull String title) throws IllegalArgumentException;
 
+    // Paper start
+    /**
+     * Creates an empty merchant.
+     *
+     * @param title the title of the corresponding merchant inventory, displayed
+     * when the merchant inventory is viewed
+     * @return a new merchant
+     */
+    @NotNull Merchant createMerchant(net.kyori.adventure.text.@Nullable Component title);
+    // Paper start
     /**
      * Creates an empty merchant.
      *
      * @param title the title of the corresponding merchant inventory, displayed
      * when the merchant inventory is viewed
      * @return a new merchant
+     * @deprecated in favour of {@link #createMerchant(net.kyori.adventure.text.Component)}
      */
     @NotNull
+    @Deprecated // Paper
     Merchant createMerchant(@Nullable String title);
 
     /**
@@ -1389,27 +1477,56 @@ public interface Server extends PluginMessageRecipient {
      */
     boolean isPrimaryThread();
 
+    // Paper start
+    /**
+     * Gets the message that is displayed on the server list.
+     *
+     * @return the server's MOTD
+     */
+    net.kyori.adventure.text.@NotNull Component motd();
+
+    /**
+     * Set the message that is displayed on the server list.
+     *
+     * @param motd The message to be displayed
+     */
+    void motd(final net.kyori.adventure.text.@NotNull Component motd);
+
+    /**
+     * Gets the default message that is displayed when the server is stopped.
+     *
+     * @return the shutdown message
+     */
+    net.kyori.adventure.text.@Nullable Component shutdownMessage();
+    // Paper end
+
     /**
      * Gets the message that is displayed on the server list.
      *
      * @return the servers MOTD
+     * @deprecated in favour of {@link #motd()}
      */
     @NotNull
+    @Deprecated // Paper
     String getMotd();
 
     /**
      * Set the message that is displayed on the server list.
      *
      * @param motd The message to be displayed
+     * @deprecated in favour of {@link #motd(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setMotd(@NotNull String motd);
 
     /**
      * Gets the default message that is displayed when the server is stopped.
      *
      * @return the shutdown message
+     * @deprecated in favour of {@link #shutdownMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     String getShutdownMessage();
 
     /**
@@ -1791,7 +1908,9 @@ public interface Server extends PluginMessageRecipient {
          * Sends the component to the player
          *
          * @param component the components to send
+         * @deprecated use {@link #broadcast(net.kyori.adventure.text.Component)}
          */
+        @Deprecated // Paper
         public void broadcast(@NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -1800,7 +1919,9 @@ public interface Server extends PluginMessageRecipient {
          * Sends an array of components as a single message to the player
          *
          * @param components the components to send
+         * @deprecated use {@link #broadcast(net.kyori.adventure.text.Component)}
          */
+        @Deprecated // Paper
         public void broadcast(@NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
diff --git a/src/main/java/org/bukkit/Sound.java b/src/main/java/org/bukkit/Sound.java
index 9b1247cdf8a2fed812c46c55193d574aafc3bc94..72ea6ddd00eed73459d700d657929f83ba1ca7ee 100644
--- a/src/main/java/org/bukkit/Sound.java
+++ b/src/main/java/org/bukkit/Sound.java
@@ -10,7 +10,7 @@ import org.jetbrains.annotations.NotNull;
  * guarantee values will not be removed from this Enum. As such, you should not
  * depend on the ordinal values of this class.
  */
-public enum Sound implements Keyed {
+public enum Sound implements Keyed, net.kyori.adventure.sound.Sound.Type { // Paper - implement Sound.Type
 
     AMBIENT_BASALT_DELTAS_ADDITIONS("ambient.basalt_deltas.additions"),
     AMBIENT_BASALT_DELTAS_LOOP("ambient.basalt_deltas.loop"),
@@ -1614,4 +1614,11 @@ public enum Sound implements Keyed {
     public NamespacedKey getKey() {
         return key;
     }
+
+    // Paper start
+    @Override
+    public net.kyori.adventure.key.@NotNull Key key() {
+        return this.key;
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/SoundCategory.java b/src/main/java/org/bukkit/SoundCategory.java
index ac5e263d737973af077e3406a84a84baca4370db..2d91924b7f5ef16a91d40cdc1bfc3d68e0fda38d 100644
--- a/src/main/java/org/bukkit/SoundCategory.java
+++ b/src/main/java/org/bukkit/SoundCategory.java
@@ -3,7 +3,7 @@ package org.bukkit;
 /**
  * An Enum of categories for sounds.
  */
-public enum SoundCategory {
+public enum SoundCategory implements net.kyori.adventure.sound.Sound.Source.Provider { // Paper - implement Sound.Source.Provider
 
     MASTER,
     MUSIC,
@@ -15,4 +15,22 @@ public enum SoundCategory {
     PLAYERS,
     AMBIENT,
     VOICE;
+
+    // Paper start - implement Sound.Source.Provider
+    @Override
+    public net.kyori.adventure.sound.Sound.@org.jetbrains.annotations.NotNull Source soundSource() {
+        return switch (this) {
+            case MASTER -> net.kyori.adventure.sound.Sound.Source.MASTER;
+            case MUSIC -> net.kyori.adventure.sound.Sound.Source.MUSIC;
+            case RECORDS -> net.kyori.adventure.sound.Sound.Source.RECORD;
+            case WEATHER -> net.kyori.adventure.sound.Sound.Source.WEATHER;
+            case BLOCKS -> net.kyori.adventure.sound.Sound.Source.BLOCK;
+            case HOSTILE -> net.kyori.adventure.sound.Sound.Source.HOSTILE;
+            case NEUTRAL -> net.kyori.adventure.sound.Sound.Source.NEUTRAL;
+            case PLAYERS -> net.kyori.adventure.sound.Sound.Source.PLAYER;
+            case AMBIENT -> net.kyori.adventure.sound.Sound.Source.AMBIENT;
+            case VOICE -> net.kyori.adventure.sound.Sound.Source.VOICE;
+        };
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java
index 4a9a82540e40685d2b837c76c431827a00cf4ba3..a3ee6f2f588bc9c87e49378359f450820b9af1b9 100644
--- a/src/main/java/org/bukkit/UnsafeValues.java
+++ b/src/main/java/org/bukkit/UnsafeValues.java
@@ -26,6 +26,15 @@ import org.jetbrains.annotations.Nullable;
  */
 @Deprecated
 public interface UnsafeValues {
+    // Paper start
+    net.kyori.adventure.text.flattener.ComponentFlattener componentFlattener();
+    @Deprecated(forRemoval = true) net.kyori.adventure.text.serializer.plain.PlainComponentSerializer plainComponentSerializer();
+    @Deprecated(forRemoval = true) net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer plainTextSerializer();
+    @Deprecated(forRemoval = true) net.kyori.adventure.text.serializer.gson.GsonComponentSerializer gsonComponentSerializer();
+    @Deprecated(forRemoval = true) net.kyori.adventure.text.serializer.gson.GsonComponentSerializer colorDownsamplingGsonComponentSerializer();
+    @Deprecated(forRemoval = true) net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer legacyComponentSerializer();
+    net.kyori.adventure.text.Component resolveWithContext(net.kyori.adventure.text.Component component, org.bukkit.command.CommandSender context, org.bukkit.entity.Entity scoreboardSubject, boolean bypassPermissions) throws java.io.IOException;
+    // Paper end
 
     Material toLegacy(Material material);
 
diff --git a/src/main/java/org/bukkit/Warning.java b/src/main/java/org/bukkit/Warning.java
index efb97712cc9dc7c1e12a59f5b94e4f2ad7c6b7d8..3024468af4c073324e536c1cb26beffb1e09f3f4 100644
--- a/src/main/java/org/bukkit/Warning.java
+++ b/src/main/java/org/bukkit/Warning.java
@@ -67,6 +67,7 @@ public @interface Warning {
          *     </ul>
          */
         public boolean printFor(@Nullable Warning warning) {
+            if (Boolean.getBoolean("paper.alwaysPrintWarningState")) return true; // Paper
             if (this == DEFAULT) {
                 return warning == null || warning.value();
             }
diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
index cd000a064732ebaa8802f3d7b7ba9bd7ba101f14..30dc2f85b60877930cab68230d3259ce92c08618 100644
--- a/src/main/java/org/bukkit/World.java
+++ b/src/main/java/org/bukkit/World.java
@@ -45,7 +45,7 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a world, which may contain entities, chunks and blocks
  */
-public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient, Metadatable, PersistentDataHolder, Keyed {
+public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient, Metadatable, PersistentDataHolder, Keyed, net.kyori.adventure.audience.ForwardingAudience { // Paper
 
     /**
      * Gets the {@link Block} at the given coordinates
@@ -606,6 +606,14 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
     @NotNull
     public List<Player> getPlayers();
 
+    // Paper start
+    @NotNull
+    @Override
+    default Iterable<? extends net.kyori.adventure.audience.Audience> audiences() {
+        return this.getPlayers();
+    }
+    // Paper end
+
     /**
      * Returns a list of entities within a bounding box centered around a
      * Location.
diff --git a/src/main/java/org/bukkit/block/CommandBlock.java b/src/main/java/org/bukkit/block/CommandBlock.java
index 372c0bd5a4d7800a11c24c95e39fe376a96232bf..9c88be68b4f403d0500cb607394b3a1646675ef7 100644
--- a/src/main/java/org/bukkit/block/CommandBlock.java
+++ b/src/main/java/org/bukkit/block/CommandBlock.java
@@ -33,7 +33,9 @@ public interface CommandBlock extends TileState {
      * by default is "@".
      *
      * @return Name of this CommandBlock.
+     * @deprecated in favour of {@link #name()}
      */
+    @Deprecated // Paper
     @NotNull
     public String getName();
 
@@ -43,6 +45,28 @@ public interface CommandBlock extends TileState {
      * same as setting it to "@".
      *
      * @param name New name for this CommandBlock.
+     * @deprecated in favour of {@link #name(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setName(@Nullable String name);
+
+    // Paper start
+    /**
+     * Gets the name of this CommandBlock.  The name is used with commands
+     * that this CommandBlock executes.  This name will never be null, and
+     * by default is a {@link net.kyori.adventure.text.TextComponent} containing {@code @}.
+     *
+     * @return Name of this CommandBlock.
+     */
+    public net.kyori.adventure.text.@NotNull Component name();
+
+    /**
+     * Sets the name of this CommandBlock.  The name is used with commands
+     * that this CommandBlock executes.  Setting the name to null is the
+     * same as setting it to a {@link net.kyori.adventure.text.TextComponent} containing {@code @}.
+     *
+     * @param name New name for this CommandBlock.
+     */
+    public void name(net.kyori.adventure.text.@Nullable Component name);
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/block/Sign.java b/src/main/java/org/bukkit/block/Sign.java
index 5fc1c759e6e8f3fd43a5fa5c6e3f777efa16b1ec..2813f96bb13b9be28867d2c045a3003a18456879 100644
--- a/src/main/java/org/bukkit/block/Sign.java
+++ b/src/main/java/org/bukkit/block/Sign.java
@@ -10,12 +10,51 @@ import org.jetbrains.annotations.NotNull;
  * Represents a captured state of either a SignPost or a WallSign.
  */
 public interface Sign extends TileState, Colorable {
+    // Paper start
+    /**
+     * Gets all the lines of text currently on the {@link Side#FRONT} of this sign.
+     *
+     * @return List of components containing each line of text
+     * @deprecated A sign may have multiple writable sides now. Use {@link Sign#getSide(Side)} and {@link SignSide#lines()}.
+     */
+    @NotNull
+    @Deprecated
+    public java.util.List<net.kyori.adventure.text.Component> lines();
+
+    /**
+     * Gets the line of text at the specified index on the {@link Side#FRONT}.
+     * <p>
+     * For example, getLine(0) will return the first line of text.
+     *
+     * @param index Line number to get the text from, starting at 0
+     * @throws IndexOutOfBoundsException Thrown when the line does not exist
+     * @return Text on the given line
+     * @deprecated A sign may have multiple writable sides now. Use {@link #getSide(Side)} and {@link SignSide#line(int)}.
+     */
+    @NotNull
+    @Deprecated
+    public net.kyori.adventure.text.Component line(int index) throws IndexOutOfBoundsException;
+
+    /**
+     * Sets the line of text at the specified index on the {@link Side#FRONT}.
+     * <p>
+     * For example, setLine(0, "Line One") will set the first line of text to
+     * "Line One".
+     *
+     * @param index Line number to set the text at, starting from 0
+     * @param line New text to set at the specified index
+     * @throws IndexOutOfBoundsException If the index is out of the range 0..3
+     * @deprecated A sign may have multiple writable sides now. Use {@link #getSide(Side)} and {@link SignSide#line(int, net.kyori.adventure.text.Component)}.
+     */
+    @Deprecated
+    public void line(int index, net.kyori.adventure.text.@NotNull Component line) throws IndexOutOfBoundsException;
+    // Paper end
 
     /**
      * Gets all the lines of text currently on the {@link Side#FRONT} of this sign.
      *
      * @return Array of Strings containing each line of text
-     * @deprecated  A sign may have multiple writable sides now. Use {@link Sign#getSide(Side)} and {@link SignSide#getLines()}.
+     * @deprecated  A sign may have multiple writable sides now. Use {@link Sign#getSide(Side)} and {@link SignSide#lines()}.
      */
     @Deprecated
     @NotNull
@@ -29,7 +68,7 @@ public interface Sign extends TileState, Colorable {
      * @param index Line number to get the text from, starting at 0
      * @return Text on the given line
      * @throws IndexOutOfBoundsException Thrown when the line does not exist
-     * @deprecated A sign may have multiple writable sides now. Use {@link #getSide(Side)} and {@link SignSide#getLine(int)}.
+     * @deprecated A sign may have multiple writable sides now. Use {@link #getSide(Side)} and {@link SignSide#line(int)}.
      */
     @Deprecated
     @NotNull
@@ -44,7 +83,7 @@ public interface Sign extends TileState, Colorable {
      * @param index Line number to set the text at, starting from 0
      * @param line New text to set at the specified index
      * @throws IndexOutOfBoundsException If the index is out of the range 0..3
-     * @deprecated A sign may have multiple writable sides now. Use {@link #getSide(Side)} and {@link SignSide#setLine(int, String)}.
+     * @deprecated A sign may have multiple writable sides now. Use {@link #getSide(Side)} and {@link SignSide#line(int, net.kyori.adventure.text.Component)}.
      */
     @Deprecated
     public void setLine(int index, @NotNull String line) throws IndexOutOfBoundsException;
diff --git a/src/main/java/org/bukkit/block/sign/SignSide.java b/src/main/java/org/bukkit/block/sign/SignSide.java
index 0f4ae7bd2ad379b5edb40f49f93de9e18c38f415..575e545a69b5279b90067d7ebee08b7b59288496 100644
--- a/src/main/java/org/bukkit/block/sign/SignSide.java
+++ b/src/main/java/org/bukkit/block/sign/SignSide.java
@@ -7,13 +7,48 @@ import org.jetbrains.annotations.NotNull;
  * Represents a side of a sign.
  */
 public interface SignSide extends Colorable {
+    // Paper start
+    /**
+     * Gets all the lines of text currently on the sign.
+     *
+     * @return List of components containing each line of text
+     */
+    @NotNull
+    public java.util.List<net.kyori.adventure.text.Component> lines();
+
+    /**
+     * Gets the line of text at the specified index.
+     * <p>
+     * For example, getLine(0) will return the first line of text.
+     *
+     * @param index Line number to get the text from, starting at 0
+     * @throws IndexOutOfBoundsException Thrown when the line does not exist
+     * @return Text on the given line
+     */
+    @NotNull
+    public net.kyori.adventure.text.Component line(int index) throws IndexOutOfBoundsException;
+
+    /**
+     * Sets the line of text at the specified index.
+     * <p>
+     * For example, setLine(0, "Line One") will set the first line of text to
+     * "Line One".
+     *
+     * @param index Line number to set the text at, starting from 0
+     * @param line New text to set at the specified index
+     * @throws IndexOutOfBoundsException If the index is out of the range 0..3
+     */
+    public void line(int index, net.kyori.adventure.text.@NotNull Component line) throws IndexOutOfBoundsException;
+    // Paper end
 
     /**
      * Gets all the lines of text currently on this side of the sign.
      *
      * @return Array of Strings containing each line of text
+     * @deprecated in favour of {@link #lines()}
      */
     @NotNull
+    @Deprecated // Paper
     public String[] getLines();
 
     /**
@@ -24,8 +59,10 @@ public interface SignSide extends Colorable {
      * @param index Line number to get the text from, starting at 0
      * @return Text on the given line
      * @throws IndexOutOfBoundsException Thrown when the line does not exist
+     * @deprecated in favour of {@link #line(int)}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLine(int index) throws IndexOutOfBoundsException;
 
     /**
@@ -37,7 +74,9 @@ public interface SignSide extends Colorable {
      * @param index Line number to set the text at, starting from 0
      * @param line New text to set at the specified index
      * @throws IndexOutOfBoundsException If the index is out of the range 0..3
+     * @deprecated in favour of {@link #line(int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setLine(int index, @NotNull String line) throws IndexOutOfBoundsException;
 
     /**
diff --git a/src/main/java/org/bukkit/command/Command.java b/src/main/java/org/bukkit/command/Command.java
index 80209bb88a0294d4eedc78509533a6257315d856..75759131bd94b672bec4cd8e271ebff1ad391cba 100644
--- a/src/main/java/org/bukkit/command/Command.java
+++ b/src/main/java/org/bukkit/command/Command.java
@@ -32,7 +32,7 @@ public abstract class Command {
     protected String description;
     protected String usageMessage;
     private String permission;
-    private String permissionMessage;
+    private net.kyori.adventure.text.Component permissionMessage; // Paper
     public org.spigotmc.CustomTimingsHandler timings; // Spigot
 
     protected Command(@NotNull String name) {
@@ -186,10 +186,10 @@ public abstract class Command {
 
         if (permissionMessage == null) {
             target.sendMessage(ChatColor.RED + "I'm sorry, but you do not have permission to perform this command. Please contact the server administrators if you believe that this is a mistake.");
-        } else if (permissionMessage.length() != 0) {
-            for (String line : permissionMessage.replace("<permission>", permission).split("\n")) {
-                target.sendMessage(line);
-            }
+            // Paper start - use components for permissionMessage
+        } else if (!permissionMessage.equals(net.kyori.adventure.text.Component.empty())) {
+            target.sendMessage(permissionMessage.replaceText(net.kyori.adventure.text.TextReplacementConfig.builder().matchLiteral("<permission>").replacement(permission).build()));
+            // Paper end
         }
 
         return false;
@@ -317,10 +317,12 @@ public abstract class Command {
      * command
      *
      * @return Permission check failed message
+     * @deprecated use {@link #permissionMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getPermissionMessage() {
-        return permissionMessage;
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serializeOrNull(permissionMessage); // Paper
     }
 
     /**
@@ -381,10 +383,12 @@ public abstract class Command {
      * @param permissionMessage new permission message, null to indicate
      *     default message, or an empty string to indicate no message
      * @return this command object, for chaining
+     * @deprecated use {@link #permissionMessage(net.kyori.adventure.text.Component)}
      */
     @NotNull
+    @Deprecated // Paper
     public Command setPermissionMessage(@Nullable String permissionMessage) {
-        this.permissionMessage = permissionMessage;
+        this.permissionMessage = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserializeOrNull(permissionMessage); // Paper
         return this;
     }
 
@@ -399,13 +403,47 @@ public abstract class Command {
         this.usageMessage = (usage == null) ? "" : usage;
         return this;
     }
+    // Paper start
+    /**
+     * Gets the permission message.
+     *
+     * @return the permission message
+     */
+    public net.kyori.adventure.text.@Nullable Component permissionMessage() {
+        return this.permissionMessage;
+    }
+
+    /**
+     * Sets the permission message.
+     *
+     * @param permissionMessage the permission message
+     */
+    public void permissionMessage(net.kyori.adventure.text.@Nullable Component permissionMessage) {
+        this.permissionMessage = permissionMessage;
+    }
+    // Paper end
 
     public static void broadcastCommandMessage(@NotNull CommandSender source, @NotNull String message) {
         broadcastCommandMessage(source, message, true);
     }
 
     public static void broadcastCommandMessage(@NotNull CommandSender source, @NotNull String message, boolean sendToSource) {
-        String result = source.getName() + ": " + message;
+        // Paper start
+        broadcastCommandMessage(source, net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message), sendToSource);
+    }
+
+    public static void broadcastCommandMessage(@NotNull CommandSender source, net.kyori.adventure.text.@NotNull Component message) {
+        broadcastCommandMessage(source, message, true);
+    }
+
+    public static void broadcastCommandMessage(@NotNull CommandSender source, net.kyori.adventure.text.@NotNull Component message, boolean sendToSource) {
+        net.kyori.adventure.text.TextComponent.Builder result = net.kyori.adventure.text.Component.text()
+            .color(net.kyori.adventure.text.format.NamedTextColor.WHITE)
+            .decoration(net.kyori.adventure.text.format.TextDecoration.ITALIC, false)
+            .append(source.name())
+            .append(net.kyori.adventure.text.Component.text(": "))
+            .append(message);
+        // Paper end
 
         if (source instanceof BlockCommandSender) {
             BlockCommandSender blockCommandSender = (BlockCommandSender) source;
@@ -424,7 +462,12 @@ public abstract class Command {
         }
 
         Set<Permissible> users = Bukkit.getPluginManager().getPermissionSubscriptions(Server.BROADCAST_CHANNEL_ADMINISTRATIVE);
-        String colored = ChatColor.GRAY + "" + ChatColor.ITALIC + "[" + result + ChatColor.GRAY + ChatColor.ITALIC + "]";
+        // Paper start
+        net.kyori.adventure.text.TextComponent.Builder colored = net.kyori.adventure.text.Component.text()
+            .color(net.kyori.adventure.text.format.NamedTextColor.GRAY)
+            .decorate(net.kyori.adventure.text.format.TextDecoration.ITALIC)
+            .append(net.kyori.adventure.text.Component.text("["), result, net.kyori.adventure.text.Component.text("]"));
+        // Paper end
 
         if (sendToSource && !(source instanceof ConsoleCommandSender)) {
             source.sendMessage(message);
diff --git a/src/main/java/org/bukkit/command/CommandSender.java b/src/main/java/org/bukkit/command/CommandSender.java
index 284be63a125624a8ae43d2c164aede810ce6bfe5..70fec73328227725f519af845ecbdce8be2fa4e2 100644
--- a/src/main/java/org/bukkit/command/CommandSender.java
+++ b/src/main/java/org/bukkit/command/CommandSender.java
@@ -6,20 +6,28 @@ import org.bukkit.permissions.Permissible;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-public interface CommandSender extends Permissible {
+public interface CommandSender extends net.kyori.adventure.audience.Audience, Permissible { // Paper
 
     /**
      * Sends this sender a message
      *
      * @param message Message to be displayed
+     * @see #sendMessage(net.kyori.adventure.text.Component)
+     * @see #sendPlainMessage(String)
+     * @see #sendRichMessage(String)
      */
+    @org.jetbrains.annotations.ApiStatus.Obsolete // Paper
     public void sendMessage(@NotNull String message);
 
     /**
      * Sends this sender multiple messages
      *
      * @param messages An array of messages to be displayed
+     * @see #sendMessage(net.kyori.adventure.text.Component)
+     * @see #sendPlainMessage(String)
+     * @see #sendRichMessage(String)
      */
+    @org.jetbrains.annotations.ApiStatus.Obsolete // Paper
     public void sendMessage(@NotNull String... messages);
 
     /**
@@ -27,7 +35,10 @@ public interface CommandSender extends Permissible {
      *
      * @param message Message to be displayed
      * @param sender The sender of this message
+     * @see #sendMessage(net.kyori.adventure.identity.Identified, net.kyori.adventure.text.Component)
+     * @deprecated sender UUID is ignored
      */
+    @Deprecated // Paper
     public void sendMessage(@Nullable UUID sender, @NotNull String message);
 
     /**
@@ -35,7 +46,10 @@ public interface CommandSender extends Permissible {
      *
      * @param messages An array of messages to be displayed
      * @param sender The sender of this message
+     * @see #sendMessage(net.kyori.adventure.identity.Identified, net.kyori.adventure.text.Component)
+     * @deprecated sender UUID is ignored
      */
+    @Deprecated // Paper
     public void sendMessage(@Nullable UUID sender, @NotNull String... messages);
 
     /**
@@ -61,7 +75,9 @@ public interface CommandSender extends Permissible {
          * Sends this sender a chat component.
          *
          * @param component the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -70,7 +86,9 @@ public interface CommandSender extends Permissible {
          * Sends an array of components as a single message to the sender.
          *
          * @param components the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -80,7 +98,9 @@ public interface CommandSender extends Permissible {
          *
          * @param component the components to send
          * @param sender the sender of the message
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@Nullable UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -90,7 +110,9 @@ public interface CommandSender extends Permissible {
          *
          * @param components the components to send
          * @param sender the sender of the message
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@Nullable UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -99,4 +121,52 @@ public interface CommandSender extends Permissible {
     @NotNull
     Spigot spigot();
     // Spigot end
+
+    // Paper start
+    /**
+     * Gets the name of this command sender
+     *
+     * @return Name of the sender
+     */
+    public net.kyori.adventure.text.@NotNull Component name();
+
+    @Override
+    default void sendMessage(final net.kyori.adventure.identity.@NotNull Identity identity, final net.kyori.adventure.text.@NotNull Component message, final net.kyori.adventure.audience.@NotNull MessageType type) {
+        this.sendMessage(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(message));
+    }
+
+    /**
+     * Sends a message with the MiniMessage format to the command sender.
+     * <p>
+     * See <a href="https://docs.advntr.dev/minimessage/">MiniMessage docs</a>
+     * for more information on the format.
+     *
+     * @param message MiniMessage content
+     */
+    default void sendRichMessage(final @NotNull String message) {
+        this.sendMessage(net.kyori.adventure.text.minimessage.MiniMessage.miniMessage().deserialize(message));
+    }
+
+    /**
+     * Sends a message with the MiniMessage format to the command sender.
+     * <p>
+     * See <a href="https://docs.advntr.dev/minimessage/">MiniMessage docs</a> and <a href="https://docs.advntr.dev/minimessage/dynamic-replacements">MiniMessage Placeholders docs</a>
+     * for more information on the format.
+     *
+     * @param message MiniMessage content
+     * @param resolvers resolvers to use
+     */
+    default void sendRichMessage(final @NotNull String message, final net.kyori.adventure.text.minimessage.tag.resolver.@NotNull TagResolver... resolvers) {
+        this.sendMessage(net.kyori.adventure.text.minimessage.MiniMessage.miniMessage().deserialize(message, resolvers));
+    }
+
+    /**
+     * Sends a plain message to the command sender.
+     *
+     * @param message plain message
+     */
+    default void sendPlainMessage(final @NotNull String message) {
+        this.sendMessage(net.kyori.adventure.text.Component.text(message));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/command/PluginCommandYamlParser.java b/src/main/java/org/bukkit/command/PluginCommandYamlParser.java
index a542c4bb3c973bbe4b976642feccde6a4d90cb7b..ef870b864c1e36032b54b31f3f85707edc06d764 100644
--- a/src/main/java/org/bukkit/command/PluginCommandYamlParser.java
+++ b/src/main/java/org/bukkit/command/PluginCommandYamlParser.java
@@ -67,7 +67,7 @@ public class PluginCommandYamlParser {
             }
 
             if (permissionMessage != null) {
-                newCmd.setPermissionMessage(permissionMessage.toString());
+                newCmd.permissionMessage(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(permissionMessage.toString())); // Paper
             }
 
             pluginCmds.add(newCmd);
diff --git a/src/main/java/org/bukkit/command/ProxiedCommandSender.java b/src/main/java/org/bukkit/command/ProxiedCommandSender.java
index fcc34b640265f4dccb46b9f09466ab8e1d96043e..5c813ac024f675951159a59d88d8baa0d49840e9 100644
--- a/src/main/java/org/bukkit/command/ProxiedCommandSender.java
+++ b/src/main/java/org/bukkit/command/ProxiedCommandSender.java
@@ -3,7 +3,7 @@ package org.bukkit.command;
 
 import org.jetbrains.annotations.NotNull;
 
-public interface ProxiedCommandSender extends CommandSender {
+public interface ProxiedCommandSender extends CommandSender, net.kyori.adventure.audience.ForwardingAudience.Single { // Paper
 
     /**
      * Returns the CommandSender which triggered this proxied command
@@ -21,4 +21,16 @@ public interface ProxiedCommandSender extends CommandSender {
     @NotNull
     CommandSender getCallee();
 
+    // Paper start
+    @Override
+    default void sendMessage(final net.kyori.adventure.identity.@NotNull Identity source, final net.kyori.adventure.text.@NotNull Component message, final net.kyori.adventure.audience.@NotNull MessageType type) {
+        net.kyori.adventure.audience.ForwardingAudience.Single.super.sendMessage(source, message, type);
+    }
+
+    @NotNull
+    @Override
+    default net.kyori.adventure.audience.Audience audience() {
+        return this.getCaller();
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/conversations/Conversable.java b/src/main/java/org/bukkit/conversations/Conversable.java
index b7d8dd30360a38dbdc7bbce40c8e6ced7261f833..0817f2395c2b18828565435568ce651f5ba99a99 100644
--- a/src/main/java/org/bukkit/conversations/Conversable.java
+++ b/src/main/java/org/bukkit/conversations/Conversable.java
@@ -55,6 +55,7 @@ public interface Conversable {
      *
      * @param message Message to be displayed
      */
+    @org.jetbrains.annotations.ApiStatus.Obsolete // Paper
     public void sendRawMessage(@NotNull String message);
 
     /**
@@ -62,6 +63,8 @@ public interface Conversable {
      *
      * @param message Message to be displayed
      * @param sender The sender of this message
+     * @deprecated sender UUID is ignored
      */
+    @Deprecated // Paper
     public void sendRawMessage(@Nullable UUID sender, @NotNull String message);
 }
diff --git a/src/main/java/org/bukkit/enchantments/Enchantment.java b/src/main/java/org/bukkit/enchantments/Enchantment.java
index c349cd16de02981392a8788ddaa3152e901aacff..6a915b5b41daa5ea64913a2d5c611a6167168395 100644
--- a/src/main/java/org/bukkit/enchantments/Enchantment.java
+++ b/src/main/java/org/bukkit/enchantments/Enchantment.java
@@ -295,6 +295,19 @@ public abstract class Enchantment implements Keyed {
      * @return True if the enchantment may be applied, otherwise False
      */
     public abstract boolean canEnchantItem(@NotNull ItemStack item);
+    // Paper start
+    /**
+     * Get the name of the enchantment with its applied level.
+     * <p>
+     * If the given {@code level} is either less than the {@link #getStartLevel()} or greater than the {@link #getMaxLevel()},
+     * the level may not be shown in the numeral format one may otherwise expect.
+     * </p>
+     *
+     * @param level the level of the enchantment to show
+     * @return the name of the enchantment with {@code level} applied
+     */
+    public abstract net.kyori.adventure.text.@NotNull Component displayName(int level);
+    // Paper end
 
     /**
      * Gets the Enchantment at the specified key
diff --git a/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java b/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java
index 7ad7bcf9a9333c8d6d1d7cab53a6d457ec20bbf6..c4f86ba1037f3f0e5d697a0962d71d6f8c7c1fbe 100644
--- a/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java
+++ b/src/main/java/org/bukkit/enchantments/EnchantmentWrapper.java
@@ -20,4 +20,11 @@ public abstract class EnchantmentWrapper extends Enchantment {
     public Enchantment getEnchantment() {
         return this;
     }
+    // Paper start
+    @NotNull
+    @Override
+    public net.kyori.adventure.text.Component displayName(int level) {
+        return getEnchantment().displayName(level);
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/entity/Entity.java b/src/main/java/org/bukkit/entity/Entity.java
index 8532b8484d5a493c1c37ad7508597f624f1831c8..978431fd88cfb7d42fcdea8c904633df5c64daed 100644
--- a/src/main/java/org/bukkit/entity/Entity.java
+++ b/src/main/java/org/bukkit/entity/Entity.java
@@ -30,7 +30,7 @@ import org.jetbrains.annotations.Nullable;
  * Not all methods are guaranteed to work/may have side effects when
  * {@link #isInWorld()} is false.
  */
-public interface Entity extends Metadatable, CommandSender, Nameable, PersistentDataHolder {
+public interface Entity extends Metadatable, CommandSender, Nameable, PersistentDataHolder, net.kyori.adventure.text.event.HoverEventSource<net.kyori.adventure.text.event.HoverEvent.ShowEntity>, net.kyori.adventure.sound.Sound.Emitter { // Paper
 
     /**
      * Gets the entity's current position
@@ -768,4 +768,20 @@ public interface Entity extends Metadatable, CommandSender, Nameable, Persistent
     @Override
     Spigot spigot();
     // Spigot end
+
+    // Paper start
+    /**
+     * Gets the entity's display name formatted with their team prefix/suffix and
+     * the entity's default hover/click events.
+     *
+     * @return the team display name
+     */
+    net.kyori.adventure.text.@NotNull Component teamDisplayName();
+
+    @NotNull
+    @Override
+    default net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowEntity> asHoverEvent(final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowEntity> op) {
+        return net.kyori.adventure.text.event.HoverEvent.showEntity(op.apply(net.kyori.adventure.text.event.HoverEvent.ShowEntity.of(this.getType().getKey(), this.getUniqueId(), this.customName())));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
index 8aee70e27688ff85367b3534c6ccb64aeba95d74..7a6be9c1d74fca1b03bf4c6ef804e8027201b8e7 100644
--- a/src/main/java/org/bukkit/entity/Player.java
+++ b/src/main/java/org/bukkit/entity/Player.java
@@ -52,7 +52,41 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a player, connected or not
  */
-public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginMessageRecipient {
+public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginMessageRecipient, net.kyori.adventure.identity.Identified, net.kyori.adventure.bossbar.BossBarViewer { // Paper
+
+    // Paper start
+    @Override
+    default net.kyori.adventure.identity.@NotNull Identity identity() {
+        return net.kyori.adventure.identity.Identity.identity(this.getUniqueId());
+    }
+
+    /**
+     * Gets an unmodifiable view of all known currently active bossbars.
+     * <p>
+     * <b>This currently only returns bossbars shown to the player via
+     * {@link #showBossBar(net.kyori.adventure.bossbar.BossBar)} and does not contain bukkit
+     * {@link org.bukkit.boss.BossBar} instances shown to the player.</b>
+     *
+     * @return an unmodifiable view of all known currently active bossbars
+     * @since 4.14.0
+     */
+    @Override
+    @org.jetbrains.annotations.UnmodifiableView @NotNull Iterable<? extends net.kyori.adventure.bossbar.BossBar> activeBossBars();
+
+    /**
+     * Gets the "friendly" name to display of this player.
+     *
+     * @return the display name
+     */
+    net.kyori.adventure.text.@NotNull Component displayName();
+
+    /**
+     * Sets the "friendly" name to display of this player.
+     *
+     * @param displayName the display name to set
+     */
+    void displayName(final net.kyori.adventure.text.@Nullable Component displayName);
+    // Paper end
 
     /**
      * {@inheritDoc}
@@ -69,7 +103,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * places defined by plugins.
      *
      * @return the friendly name
+     * @deprecated in favour of {@link #displayName()}
      */
+    @Deprecated // Paper
     @NotNull
     public String getDisplayName();
 
@@ -81,15 +117,50 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * places defined by plugins.
      *
      * @param name The new display name.
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setDisplayName(@Nullable String name);
 
+    // Paper start
+    /**
+     * Sets the name that is shown on the in-game player list.
+     * <p>
+     * If the value is null, the name will be identical to {@link #getName()}.
+     *
+     * @param name new player list name
+     */
+    void playerListName(net.kyori.adventure.text.@Nullable Component name);
+
+    /**
+     * Gets the name that is shown on the in-game player list.
+     *
+     * @return the player list name
+     */
+    net.kyori.adventure.text.@NotNull Component playerListName();
+
+    /**
+     * Gets the currently displayed player list header for this player.
+     *
+     * @return player list header or null
+     */
+    net.kyori.adventure.text.@Nullable Component playerListHeader();
+
+    /**
+     * Gets the currently displayed player list footer for this player.
+     *
+     * @return player list footer or null
+     */
+    net.kyori.adventure.text.@Nullable Component playerListFooter();
+    // Paper end
     /**
      * Gets the name that is shown on the player list.
      *
      * @return the player list name
+     * @deprecated in favour of {@link #playerListName()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getPlayerListName();
 
     /**
@@ -98,14 +169,18 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * If the value is null, the name will be identical to {@link #getName()}.
      *
      * @param name new player list name
+     * @deprecated in favour of {@link #playerListName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListName(@Nullable String name);
 
     /**
      * Gets the currently displayed player list header for this player.
      *
      * @return player list header or null
+     * @deprecated in favour of {@link #playerListHeader()}
      */
+    @Deprecated // Paper
     @Nullable
     public String getPlayerListHeader();
 
@@ -113,7 +188,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * Gets the currently displayed player list footer for this player.
      *
      * @return player list header or null
+     * @deprecated in favour of {@link #playerListFooter()}
      */
+    @Deprecated // Paper
     @Nullable
     public String getPlayerListFooter();
 
@@ -121,14 +198,18 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * Sets the currently displayed player list header for this player.
      *
      * @param header player list header, null for empty
+     * @deprecated in favour of {@link #sendPlayerListHeader(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListHeader(@Nullable String header);
 
     /**
      * Sets the currently displayed player list footer for this player.
      *
      * @param footer player list footer, null for empty
+     * @deprecated in favour of {@link #sendPlayerListFooter(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListFooter(@Nullable String footer);
 
     /**
@@ -137,7 +218,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *
      * @param header player list header, null for empty
      * @param footer player list footer, null for empty
+     * @deprecated in favour of {@link #sendPlayerListHeaderAndFooter(net.kyori.adventure.text.Component, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setPlayerListHeaderFooter(@Nullable String header, @Nullable String footer);
 
     /**
@@ -175,9 +258,25 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * Kicks player with custom kick message.
      *
      * @param message kick message
+     * @deprecated in favour of {@link #kick(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void kickPlayer(@Nullable String message);
 
+    // Paper start
+    /**
+     * Kicks the player with the default kick message.
+     * @see #kick(net.kyori.adventure.text.Component)
+     */
+    void kick();
+    /**
+     * Kicks player with custom kick message.
+     *
+     * @param message kick message
+     */
+    void kick(final net.kyori.adventure.text.@Nullable Component message);
+    // Paper end
+
     /**
      * Adds this user to the {@link ProfileBanList}. If a previous ban exists, this will
      * update the entry.
@@ -799,6 +898,106 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      */
     public void sendEquipmentChange(@NotNull LivingEntity entity, @NotNull Map<EquipmentSlot, ItemStack> items);
 
+    // Paper start
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Use {@link #sendBlockUpdate(Location, TileState)} by creating a new virtual
+     * {@link org.bukkit.block.Sign} block state via {@link BlockData#createBlockState()}
+     * (constructed e.g. via {@link Material#createBlockData()})
+     */
+    @Deprecated
+    default void sendSignChange(@NotNull Location loc, @Nullable java.util.List<? extends net.kyori.adventure.text.Component> lines) throws IllegalArgumentException {
+        this.sendSignChange(loc, lines, DyeColor.BLACK);
+    }
+
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @param dyeColor the color of the sign
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if dyeColor is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Use {@link #sendBlockUpdate(Location, TileState)} by creating a new virtual
+     * {@link org.bukkit.block.Sign} block state via {@link BlockData#createBlockState()}
+     * (constructed e.g. via {@link Material#createBlockData()})
+     */
+    @Deprecated
+    default void sendSignChange(@NotNull Location loc, @Nullable java.util.List<? extends net.kyori.adventure.text.Component> lines, @NotNull DyeColor dyeColor) throws IllegalArgumentException {
+        this.sendSignChange(loc, lines, dyeColor, false);
+    }
+
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @param hasGlowingText whether the text of the sign should glow as if dyed with a glowing ink sac
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if dyeColor is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Use {@link #sendBlockUpdate(Location, TileState)} by creating a new virtual
+     * {@link org.bukkit.block.Sign} block state via {@link BlockData#createBlockState()}
+     * (constructed e.g. via {@link Material#createBlockData()})
+     */
+    @Deprecated
+    default void sendSignChange(@NotNull Location loc, @Nullable java.util.List<? extends net.kyori.adventure.text.Component> lines, boolean hasGlowingText) throws IllegalArgumentException {
+        this.sendSignChange(loc, lines, DyeColor.BLACK, hasGlowingText);
+    }
+
+    /**
+     * Send a sign change. This fakes a sign change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * This method will use a sign at the location's block or a faked sign
+     * sent via
+     * {@link #sendBlockChange(org.bukkit.Location, org.bukkit.Material, byte)}.
+     * <p>
+     * If the client does not have a sign at the given location it will
+     * display an error message to the user.
+     *
+     * @param loc the location of the sign
+     * @param lines the new text on the sign or null to clear it
+     * @param dyeColor the color of the sign
+     * @param hasGlowingText whether the text of the sign should glow as if dyed with a glowing ink sac
+     * @throws IllegalArgumentException if location is null
+     * @throws IllegalArgumentException if dyeColor is null
+     * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Use {@link #sendBlockUpdate(Location, TileState)} by creating a new virtual
+     * {@link org.bukkit.block.Sign} block state via {@link BlockData#createBlockState()}
+     * (constructed e.g. via {@link Material#createBlockData()})
+     */
+    @Deprecated
+    void sendSignChange(@NotNull Location loc, @Nullable java.util.List<? extends net.kyori.adventure.text.Component> lines, @NotNull DyeColor dyeColor, boolean hasGlowingText)
+        throws IllegalArgumentException;
+    // Paper end
+
     /**
      * Send a sign change. This fakes a sign change packet for a user at
      * a certain location. This will not actually change the world in any way.
@@ -816,7 +1015,11 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @param lines the new text on the sign or null to clear it
      * @throws IllegalArgumentException if location is null
      * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Use {@link #sendBlockUpdate(Location, TileState)} by creating a new virtual
+     * {@link org.bukkit.block.Sign} block state via {@link BlockData#createBlockState()}
+     * (constructed e.g. via {@link Material#createBlockData()})
      */
+    @Deprecated // Paper
     public void sendSignChange(@NotNull Location loc, @Nullable String[] lines) throws IllegalArgumentException;
 
     /**
@@ -838,7 +1041,11 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException if location is null
      * @throws IllegalArgumentException if dyeColor is null
      * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Use {@link #sendBlockUpdate(Location, TileState)} by creating a new virtual
+     * {@link org.bukkit.block.Sign} block state via {@link BlockData#createBlockState()}
+     * (constructed e.g. via {@link Material#createBlockData()})
      */
+    @Deprecated // Paper
     public void sendSignChange(@NotNull Location loc, @Nullable String[] lines, @NotNull DyeColor dyeColor) throws IllegalArgumentException;
 
     /**
@@ -861,7 +1068,11 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException if location is null
      * @throws IllegalArgumentException if dyeColor is null
      * @throws IllegalArgumentException if lines is non-null and has a length less than 4
+     * @deprecated Use {@link #sendBlockUpdate(Location, TileState)} by creating a new virtual
+     * {@link org.bukkit.block.Sign} block state via {@link BlockData#createBlockState()}
+     * (constructed e.g. via {@link Material#createBlockData()})
      */
+    @Deprecated // Paper
     public void sendSignChange(@NotNull Location loc, @Nullable String[] lines, @NotNull DyeColor dyeColor, boolean hasGlowingText) throws IllegalArgumentException;
 
     /**
@@ -1309,7 +1520,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException Thrown if the URL is null.
      * @throws IllegalArgumentException Thrown if the URL is too long.
      * @deprecated Minecraft no longer uses textures packs. Instead you
-     *     should use {@link #setResourcePack(String)}.
+     *     should use {@link #setResourcePack(UUID, String, byte[], net.kyori.adventure.text.Component, boolean)}.
      */
     @Deprecated
     public void setTexturePack(@NotNull String url);
@@ -1377,6 +1588,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *     pack correctly.
      * </ul>
      *
+     * @deprecated in favour of {@link #setResourcePack(UUID, String, byte[], net.kyori.adventure.text.Component, boolean)}
      * @param url The URL from which the client will download the resource
      *     pack. The string must contain only US-ASCII characters and should
      *     be encoded as per RFC 1738.
@@ -1389,6 +1601,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
      *     long.
      */
+    @Deprecated // Paper - adventure
     public void setResourcePack(@NotNull String url, @Nullable byte[] hash);
 
     /**
@@ -1420,6 +1633,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *     pack correctly.
      * </ul>
      *
+     * @deprecated in favour of {@link #setResourcePack(UUID, String, byte[], net.kyori.adventure.text.Component, boolean)}
      * @param url The URL from which the client will download the resource
      *     pack. The string must contain only US-ASCII characters and should
      *     be encoded as per RFC 1738.
@@ -1433,8 +1647,54 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
      *     long.
      */
+    @Deprecated // Paper - adventure
     public void setResourcePack(@NotNull String url, @Nullable byte[] hash, @Nullable String prompt);
 
+    // Paper start
+    /**
+     * Request that the player's client download and switch resource packs.
+     * <p>
+     * The player's client will download the new resource pack asynchronously
+     * in the background, and will automatically switch to it once the
+     * download is complete. If the client has downloaded and cached a
+     * resource pack with the same hash in the past it will not download but
+     * directly apply the cached pack. If the hash is null and the client has
+     * downloaded and cached the same resource pack in the past, it will
+     * perform a file size check against the response content to determine if
+     * the resource pack has changed and needs to be downloaded again. When
+     * this request is sent for the very first time from a given server, the
+     * client will first display a confirmation GUI to the player before
+     * proceeding with the download.
+     * <p>
+     * Notes:
+     * <ul>
+     * <li>Players can disable server resources on their client, in which
+     *     case this method will have no affect on them. Use the
+     *     {@link PlayerResourcePackStatusEvent} to figure out whether or not
+     *     the player loaded the pack!
+     * <li>The request is sent with empty string as the hash when the hash is
+     *     not provided. This might result in newer versions not loading the
+     *     pack correctly.
+     * </ul>
+     *
+     * @param url The URL from which the client will download the resource
+     *     pack. The string must contain only US-ASCII characters and should
+     *     be encoded as per RFC 1738.
+     * @param hash The sha1 hash sum of the resource pack file which is used
+     *     to apply a cached version of the pack directly without downloading
+     *     if it is available. Hast to be 20 bytes long!
+     * @param prompt The optional custom prompt message to be shown to client.
+     * @throws IllegalArgumentException Thrown if the URL is null.
+     * @throws IllegalArgumentException Thrown if the URL is too long. The
+     *     length restriction is an implementation specific arbitrary value.
+     * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
+     *     long.
+     */
+    default void setResourcePack(final @NotNull String url, final byte @Nullable [] hash, final net.kyori.adventure.text.@Nullable Component prompt) {
+        this.setResourcePack(url, hash, prompt, false);
+    }
+    // Paper end
+
     /**
      * Request that the player's client download and switch resource packs.
      * <p>
@@ -1464,6 +1724,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *     pack correctly.
      * </ul>
      *
+     * @deprecated in favour of {@link #setResourcePack(String, byte[], net.kyori.adventure.text.Component, boolean)}
      * @param url The URL from which the client will download the resource
      *     pack. The string must contain only US-ASCII characters and should
      *     be encoded as per RFC 1738.
@@ -1524,8 +1785,56 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
      *     long.
      */
+    @Deprecated // Paper
     public void setResourcePack(@NotNull String url, @Nullable byte[] hash, @Nullable String prompt, boolean force);
 
+    // Paper start
+    /**
+     * Request that the player's client download and switch resource packs.
+     * <p>
+     * The player's client will download the new resource pack asynchronously
+     * in the background, and will automatically switch to it once the
+     * download is complete. If the client has downloaded and cached a
+     * resource pack with the same hash in the past it will not download but
+     * directly apply the cached pack. If the hash is null and the client has
+     * downloaded and cached the same resource pack in the past, it will
+     * perform a file size check against the response content to determine if
+     * the resource pack has changed and needs to be downloaded again. When
+     * this request is sent for the very first time from a given server, the
+     * client will first display a confirmation GUI to the player before
+     * proceeding with the download.
+     * <p>
+     * Notes:
+     * <ul>
+     * <li>Players can disable server resources on their client, in which
+     *     case this method will have no affect on them. Use the
+     *     {@link PlayerResourcePackStatusEvent} to figure out whether or not
+     *     the player loaded the pack!
+     * <li>The request is sent with empty string as the hash when the hash is
+     *     not provided. This might result in newer versions not loading the
+     *     pack correctly.
+     * </ul>
+     *
+     * @param url The URL from which the client will download the resource
+     *     pack. The string must contain only US-ASCII characters and should
+     *     be encoded as per RFC 1738.
+     * @param hash The sha1 hash sum of the resource pack file which is used
+     *     to apply a cached version of the pack directly without downloading
+     *     if it is available. Hast to be 20 bytes long!
+     * @param prompt The optional custom prompt message to be shown to client.
+     * @param force If true, the client will be disconnected from the server
+     *     when it declines to use the resource pack.
+     * @throws IllegalArgumentException Thrown if the URL is null.
+     * @throws IllegalArgumentException Thrown if the URL is too long. The
+     *     length restriction is an implementation specific arbitrary value.
+     * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
+     *     long.
+     */
+    default void setResourcePack(final @NotNull String url, final byte @Nullable [] hash, final net.kyori.adventure.text.@Nullable Component prompt, final boolean force) {
+        this.setResourcePack(UUID.nameUUIDFromBytes(url.getBytes(java.nio.charset.StandardCharsets.UTF_8)), url, hash, prompt, force);
+    }
+    // Paper end
+
     /**
      * Request that the player's client download and switch resource packs.
      * <p>
@@ -1570,9 +1879,57 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *     length restriction is an implementation specific arbitrary value.
      * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
      *     long.
+     * @deprecated use {@link #setResourcePack(UUID, String, byte[], net.kyori.adventure.text.Component, boolean)} )}
      */
+    @Deprecated // Paper - adventure
     public void setResourcePack(@NotNull UUID id, @NotNull String url, @Nullable byte[] hash, @Nullable String prompt, boolean force);
 
+    // Paper start
+    /**
+     * Request that the player's client download and switch resource packs.
+     * <p>
+     * The player's client will download the new resource pack asynchronously
+     * in the background, and will automatically switch to it once the
+     * download is complete. If the client has downloaded and cached a
+     * resource pack with the same hash in the past it will not download but
+     * directly apply the cached pack. If the hash is null and the client has
+     * downloaded and cached the same resource pack in the past, it will
+     * perform a file size check against the response content to determine if
+     * the resource pack has changed and needs to be downloaded again. When
+     * this request is sent for the very first time from a given server, the
+     * client will first display a confirmation GUI to the player before
+     * proceeding with the download.
+     * <p>
+     * Notes:
+     * <ul>
+     * <li>Players can disable server resources on their client, in which
+     *     case this method will have no affect on them. Use the
+     *     {@link PlayerResourcePackStatusEvent} to figure out whether or not
+     *     the player loaded the pack!
+     * <li>The request is sent with empty string as the hash when the hash is
+     *     not provided. This might result in newer versions not loading the
+     *     pack correctly.
+     * </ul>
+     *
+     * @param uuid Unique resource pack ID.
+     * @param url The URL from which the client will download the resource
+     *     pack. The string must contain only US-ASCII characters and should
+     *     be encoded as per RFC 1738.
+     * @param hash The sha1 hash sum of the resource pack file which is used
+     *     to apply a cached version of the pack directly without downloading
+     *     if it is available. Hast to be 20 bytes long!
+     * @param prompt The optional custom prompt message to be shown to client.
+     * @param force If true, the client will be disconnected from the server
+     *     when it declines to use the resource pack.
+     * @throws IllegalArgumentException Thrown if the URL is null.
+     * @throws IllegalArgumentException Thrown if the URL is too long. The
+     *     length restriction is an implementation specific arbitrary value.
+     * @throws IllegalArgumentException Thrown if the hash is not 20 bytes
+     *     long.
+     */
+    void setResourcePack(@NotNull UUID uuid, @NotNull String url, byte @Nullable [] hash, net.kyori.adventure.text.@Nullable Component prompt, boolean force);
+    // Paper end
+
     /**
      * Gets the Scoreboard displayed to this player
      *
@@ -1707,7 +2064,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      *
      * @param title Title text
      * @param subtitle Subtitle text
-     * @deprecated API behavior subject to change
+     * @deprecated Use {@link #showTitle(net.kyori.adventure.title.Title)} or {@link #sendTitlePart(net.kyori.adventure.title.TitlePart, Object)}
      */
     @Deprecated
     public void sendTitle(@Nullable String title, @Nullable String subtitle);
@@ -1726,7 +2083,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * @param fadeIn time in ticks for titles to fade in. Defaults to 10.
      * @param stay time in ticks for titles to stay. Defaults to 70.
      * @param fadeOut time in ticks for titles to fade out. Defaults to 20.
+     * @deprecated Use {@link #showTitle(net.kyori.adventure.title.Title)} or {@link #sendTitlePart(net.kyori.adventure.title.TitlePart, Object)}
      */
+    @Deprecated // Paper - Adventure
     public void sendTitle(@Nullable String title, @Nullable String subtitle, int fadeIn, int stay, int fadeOut);
 
     /**
@@ -1953,6 +2312,14 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      */
     public int getClientViewDistance();
 
+    // Paper start
+    /**
+     * Gets the player's current locale.
+     *
+     * @return the player's locale
+     */
+    @NotNull java.util.Locale locale();
+    // Paper end
     /**
      * Gets the player's estimated ping in milliseconds.
      *
@@ -1978,8 +2345,10 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      * they wish.
      *
      * @return the player's locale
+     * @deprecated in favour of {@link #locale()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLocale();
 
     /**
@@ -2031,6 +2400,14 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      */
     public boolean isAllowingServerListings();
 
+    // Paper start
+    @NotNull
+    @Override
+    default net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowEntity> asHoverEvent(final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowEntity> op) {
+        return net.kyori.adventure.text.event.HoverEvent.showEntity(op.apply(net.kyori.adventure.text.event.HoverEvent.ShowEntity.of(this.getType().getKey(), this.getUniqueId(), this.displayName())));
+    }
+    // Paper end
+
     // Spigot start
     public class Spigot extends Entity.Spigot {
 
@@ -2062,11 +2439,13 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
             throw new UnsupportedOperationException("Not supported yet.");
         }
 
+        @Deprecated // Paper
         @Override
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
 
+        @Deprecated // Paper
         @Override
         public void sendMessage(@NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
@@ -2077,7 +2456,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          *
          * @param position the screen position
          * @param component the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -2087,7 +2468,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          *
          * @param position the screen position
          * @param components the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -2098,7 +2481,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          * @param position the screen position
          * @param sender the sender of the message
          * @param component the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @Nullable java.util.UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent component) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -2109,7 +2494,9 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
          * @param position the screen position
          * @param sender the sender of the message
          * @param components the components to send
+         * @deprecated use {@code sendMessage} methods that accept {@link net.kyori.adventure.text.Component}
          */
+        @Deprecated // Paper
         public void sendMessage(@NotNull net.md_5.bungee.api.ChatMessageType position, @Nullable java.util.UUID sender, @NotNull net.md_5.bungee.api.chat.BaseComponent... components) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
diff --git a/src/main/java/org/bukkit/entity/TextDisplay.java b/src/main/java/org/bukkit/entity/TextDisplay.java
index d6d7ada3d3ff9a033ce3f780b104ef3e176f9083..f101ffde9e7b3f6c3ab6f1cffb8d6f4e720634b2 100644
--- a/src/main/java/org/bukkit/entity/TextDisplay.java
+++ b/src/main/java/org/bukkit/entity/TextDisplay.java
@@ -13,17 +13,37 @@ public interface TextDisplay extends Display {
      * Gets the displayed text.
      *
      * @return the displayed text.
+     * @deprecated in favour of {@link #text()}
      */
     @Nullable
+    @Deprecated // Paper
     String getText();
 
     /**
      * Sets the displayed text.
      *
      * @param text the new text
+     * @deprecated in favour of {@link #text(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setText(@Nullable String text);
 
+    // Paper start
+    /**
+     * Gets the displayed text.
+     *
+     * @return the displayed text
+     */
+    net.kyori.adventure.text.@NotNull Component text();
+
+    /**
+     * Sets the displayed text.
+     *
+     * @param text the new text
+     */
+    void text(net.kyori.adventure.text.@Nullable Component text);
+    // Paper end
+
     /**
      * Gets the maximum line width before wrapping.
      *
diff --git a/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java b/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java
index 63c80b4ee1f7adc8a9efc3b607993104b1991f90..91cab8b13d5bba34007f124838b32a1df58c5ac7 100644
--- a/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java
+++ b/src/main/java/org/bukkit/entity/minecart/CommandMinecart.java
@@ -32,7 +32,9 @@ public interface CommandMinecart extends Minecart {
      * same as setting it to "@".
      *
      * @param name New name for this CommandMinecart.
+     * @deprecated in favour of {@link #customName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setName(@Nullable String name);
 
 }
diff --git a/src/main/java/org/bukkit/event/block/SignChangeEvent.java b/src/main/java/org/bukkit/event/block/SignChangeEvent.java
index f4ac033ff8794a61c82a49dc6c3f863f3291455d..d944d67f544494355f03c5bc9afd8ea7726e6412 100644
--- a/src/main/java/org/bukkit/event/block/SignChangeEvent.java
+++ b/src/main/java/org/bukkit/event/block/SignChangeEvent.java
@@ -17,18 +17,38 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private boolean cancel = false;
     private final Player player;
-    private final String[] lines;
+    private final java.util.List<net.kyori.adventure.text.Component> adventure$lines; // Paper
     private final Side side;
 
+    // Paper start
+    public SignChangeEvent(@NotNull final Block theBlock, @NotNull final Player player, @NotNull final java.util.List<net.kyori.adventure.text.Component> adventure$lines, @NotNull Side side) {
+        super(theBlock);
+        this.player = player;
+        this.adventure$lines = adventure$lines;
+        this.side = side;
+    }
+
+    @Deprecated
+    public SignChangeEvent(@NotNull final Block theBlock, @NotNull final Player player, @NotNull final java.util.List<net.kyori.adventure.text.Component> adventure$lines) {
+        this(theBlock, player, adventure$lines, Side.FRONT);
+    }
+    // Paper end
+
     @Deprecated
     public SignChangeEvent(@NotNull final Block theBlock, @NotNull final Player thePlayer, @NotNull final String[] theLines) {
         this(theBlock, thePlayer, theLines, Side.FRONT);
     }
 
+    @Deprecated // Paper
     public SignChangeEvent(@NotNull final Block theBlock, @NotNull final Player thePlayer, @NotNull final String[] theLines, @NotNull Side side) {
         super(theBlock);
         this.player = thePlayer;
-        this.lines = theLines;
+        // Paper start
+        this.adventure$lines = new java.util.ArrayList<>();
+        for (String theLine : theLines) {
+            this.adventure$lines.add(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(theLine));
+        }
+        // Paper end
         this.side = side;
     }
 
@@ -42,14 +62,52 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
         return player;
     }
 
+    // Paper start
+    /**
+     * Gets all of the lines of text from the sign involved in this event.
+     *
+     * @return the String array for the sign's lines new text
+     */
+    public @NotNull java.util.List<net.kyori.adventure.text.Component> lines() {
+        return this.adventure$lines;
+    }
+
+    /**
+     * Gets a single line of text from the sign involved in this event.
+     *
+     * @param index index of the line to get
+     * @return the String containing the line of text associated with the
+     *     provided index
+     * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
+     *     or < 0}
+     */
+    public net.kyori.adventure.text.@Nullable Component line(int index) throws IndexOutOfBoundsException {
+        return this.adventure$lines.get(index);
+    }
+
+    /**
+     * Sets a single line for the sign involved in this event
+     *
+     * @param index index of the line to set
+     * @param line text to set
+     * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
+     *     or < 0}
+     */
+    public void line(int index, net.kyori.adventure.text.@Nullable Component line) throws IndexOutOfBoundsException {
+        this.adventure$lines.set(index, line);
+    }
+    // Paper end
+
     /**
      * Gets all of the lines of text from the sign involved in this event.
      *
      * @return the String array for the sign's lines new text
+     * @deprecated in favour of {@link #lines()}
      */
     @NotNull
+    @Deprecated // Paper
     public String[] getLines() {
-        return lines;
+        return adventure$lines.stream().map(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection()::serialize).toArray(String[]::new); // Paper
     }
 
     /**
@@ -60,10 +118,12 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
      *     provided index
      * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
      *     or < 0}
+     * @deprecated in favour of {@link #line(int)}
      */
     @Nullable
+    @Deprecated // Paper
     public String getLine(int index) throws IndexOutOfBoundsException {
-        return lines[index];
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.adventure$lines.get(index)); // Paper
     }
 
     /**
@@ -73,9 +133,11 @@ public class SignChangeEvent extends BlockEvent implements Cancellable {
      * @param line text to set
      * @throws IndexOutOfBoundsException thrown when the provided index is {@literal > 3
      *     or < 0}
+     * @deprecated in favour of {@link #line(int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setLine(int index, @Nullable String line) throws IndexOutOfBoundsException {
-        lines[index] = line;
+        adventure$lines.set(index, line != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(line) : null); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java b/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java
index 3c2ea8fec3a748cab7f5ad9100d12bd8213ec6c9..a803bfea5400b3578bb4cf3261874e873b6467d9 100644
--- a/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java
+++ b/src/main/java/org/bukkit/event/entity/PlayerDeathEvent.java
@@ -12,25 +12,48 @@ import org.jetbrains.annotations.Nullable;
 public class PlayerDeathEvent extends EntityDeathEvent {
     private int newExp = 0;
     private String deathMessage = "";
+    private net.kyori.adventure.text.Component adventure$deathMessage; // Paper
     private int newLevel = 0;
     private int newTotalExp = 0;
     private boolean keepLevel = false;
     private boolean keepInventory = false;
+    // Paper start
+    public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, @Nullable final net.kyori.adventure.text.Component adventure$deathMessage) {
+        this(player, drops, droppedExp, 0, adventure$deathMessage, null);
+    }
+
+    public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, @Nullable final net.kyori.adventure.text.Component adventure$deathMessage, @Nullable String deathMessage) {
+        this(player, drops, droppedExp, newExp, 0, 0, adventure$deathMessage, deathMessage);
+    }
 
+    public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, final int newTotalExp, final int newLevel, @Nullable final net.kyori.adventure.text.Component adventure$deathMessage, @Nullable String deathMessage) {
+        super(player, drops, droppedExp);
+        this.newExp = newExp;
+        this.newTotalExp = newTotalExp;
+        this.newLevel = newLevel;
+        this.deathMessage = deathMessage;
+        this.adventure$deathMessage = adventure$deathMessage;
+    }
+    // Paper end
+
+    @Deprecated // Paper
     public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, @Nullable final String deathMessage) {
         this(player, drops, droppedExp, 0, deathMessage);
     }
 
+    @Deprecated // Paper
     public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, @Nullable final String deathMessage) {
         this(player, drops, droppedExp, newExp, 0, 0, deathMessage);
     }
 
+    @Deprecated // Paper
     public PlayerDeathEvent(@NotNull final Player player, @NotNull final List<ItemStack> drops, final int droppedExp, final int newExp, final int newTotalExp, final int newLevel, @Nullable final String deathMessage) {
         super(player, drops, droppedExp);
         this.newExp = newExp;
         this.newTotalExp = newTotalExp;
         this.newLevel = newLevel;
         this.deathMessage = deathMessage;
+        this.adventure$deathMessage = deathMessage != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(deathMessage) : null; // Paper
     }
 
     @NotNull
@@ -39,25 +62,55 @@ public class PlayerDeathEvent extends EntityDeathEvent {
         return (Player) entity;
     }
 
+    // Paper start
+    /**
+     * Set the death message that will appear to everyone on the server.
+     *
+     * @param deathMessage Message to appear to other players on the server.
+     */
+    public void deathMessage(net.kyori.adventure.text.@Nullable Component deathMessage) {
+        this.deathMessage = null;
+        this.adventure$deathMessage = deathMessage;
+    }
+
+    /**
+     * Get the death message that will appear to everyone on the server.
+     *
+     * @return Message to appear to other players on the server.
+     */
+    public net.kyori.adventure.text.@Nullable Component deathMessage() {
+        return this.adventure$deathMessage;
+    }
+    // Paper end
+
     /**
      * Set the death message that will appear to everyone on the server.
      *
      * @param deathMessage Message to appear to other players on the server.
+     * @deprecated in favour of {@link #deathMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setDeathMessage(@Nullable String deathMessage) {
         this.deathMessage = deathMessage;
+        this.adventure$deathMessage = deathMessage != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(deathMessage) : null; // Paper
     }
 
     /**
      * Get the death message that will appear to everyone on the server.
      *
      * @return Message to appear to other players on the server.
+     * @deprecated in favour of {@link #deathMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getDeathMessage() {
-        return deathMessage;
+        return this.deathMessage != null ? this.deathMessage : (this.adventure$deathMessage != null ? getDeathMessageString(this.adventure$deathMessage) : null); // Paper
     }
-
+    // Paper start //TODO: add translation API to drop String deathMessage in favor of just Adventure
+    private static String getDeathMessageString(net.kyori.adventure.text.Component component) {
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(component);
+    }
+    // Paper end
     /**
      * Gets how much EXP the Player should have at respawn.
      * <p>
diff --git a/src/main/java/org/bukkit/event/inventory/InventoryType.java b/src/main/java/org/bukkit/event/inventory/InventoryType.java
index a2e9bedc4d7c56f1ae6bd6ace2dff41537e41829..c3aeb1b622509ecd9e2230ce82e3bf07899fa540 100644
--- a/src/main/java/org/bukkit/event/inventory/InventoryType.java
+++ b/src/main/java/org/bukkit/event/inventory/InventoryType.java
@@ -163,6 +163,18 @@ public enum InventoryType {
     private final String title;
     private final boolean isCreatable;
 
+    // Paper start
+    private final net.kyori.adventure.text.Component defaultTitleComponent;
+
+    /**
+     * Gets the inventory's default title.
+     *
+     * @return the inventory's default title
+     */
+    public net.kyori.adventure.text.@NotNull Component defaultTitle() {
+        return defaultTitleComponent;
+    }
+    // Paper end
     private InventoryType(int defaultSize, /*@NotNull*/ String defaultTitle) {
         this(defaultSize, defaultTitle, true);
     }
@@ -171,6 +183,7 @@ public enum InventoryType {
         size = defaultSize;
         title = defaultTitle;
         this.isCreatable = isCreatable;
+        this.defaultTitleComponent = net.kyori.adventure.text.Component.text(defaultTitle); // Paper - Adventure
     }
 
     public int getDefaultSize() {
@@ -178,6 +191,7 @@ public enum InventoryType {
     }
 
     @NotNull
+    @Deprecated // Paper
     public String getDefaultTitle() {
         return title;
     }
diff --git a/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java b/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java
index 9c68c3f2d61500479f48b80264f625aaae2f3204..399afcd19fcb6acd24857ed6ab48cf0d105a01a3 100644
--- a/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java
+++ b/src/main/java/org/bukkit/event/player/AsyncPlayerChatEvent.java
@@ -22,7 +22,11 @@ import org.jetbrains.annotations.NotNull;
  * <p>
  * Care should be taken to check {@link #isAsynchronous()} and treat the event
  * appropriately.
+ *
+ * @deprecated use {@link io.papermc.paper.event.player.AsyncChatEvent} instead
  */
+@Deprecated // Paper
+@org.bukkit.Warning(value = false, reason = "Don't nag on old event yet") // Paper
 public class AsyncPlayerChatEvent extends PlayerEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private boolean cancel = false;
diff --git a/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java b/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java
index 9866c07c999f46cb585709804aaad710c3031d5a..c7c45e2de8cca1bf8b8e12752e08db62403efa6a 100644
--- a/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java
+++ b/src/main/java/org/bukkit/event/player/AsyncPlayerPreLoginEvent.java
@@ -14,7 +14,7 @@ import org.jetbrains.annotations.NotNull;
 public class AsyncPlayerPreLoginEvent extends Event {
     private static final HandlerList handlers = new HandlerList();
     private Result result;
-    private String message;
+    private net.kyori.adventure.text.Component message; // Paper
     private final String name;
     private final InetAddress ipAddress;
     private final UUID uniqueId;
@@ -27,7 +27,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
     public AsyncPlayerPreLoginEvent(@NotNull final String name, @NotNull final InetAddress ipAddress, @NotNull final UUID uniqueId) {
         super(true);
         this.result = Result.ALLOWED;
-        this.message = "";
+        this.message = net.kyori.adventure.text.Component.empty(); // Paper
         this.name = name;
         this.ipAddress = ipAddress;
         this.uniqueId = uniqueId;
@@ -79,6 +79,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
         this.result = result == null ? null : Result.valueOf(result.name());
     }
 
+    // Paper start
     /**
      * Gets the current kick message that will be used if getResult() !=
      * Result.ALLOWED
@@ -86,7 +87,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
      * @return Current kick message
      */
     @NotNull
-    public String getKickMessage() {
+    public net.kyori.adventure.text.Component kickMessage() {
         return message;
     }
 
@@ -95,16 +96,66 @@ public class AsyncPlayerPreLoginEvent extends Event {
      *
      * @param message New kick message
      */
-    public void setKickMessage(@NotNull final String message) {
+    public void kickMessage(@NotNull final net.kyori.adventure.text.Component message) {
+        this.message = message;
+    }
+
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     */
+    public void disallow(@NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        this.result = result;
         this.message = message;
     }
 
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     * @deprecated This method uses a deprecated enum from {@link
+     *     PlayerPreLoginEvent}
+     * @see #disallow(Result, String)
+     */
+    @Deprecated
+    public void disallow(@NotNull final PlayerPreLoginEvent.Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        this.result = result == null ? null : Result.valueOf(result.name());
+        this.message = message;
+    }
+    // Paper end
+    /**
+     * Gets the current kick message that will be used if getResult() !=
+     * Result.ALLOWED
+     *
+     * @return Current kick message
+     * @deprecated in favour of {@link #kickMessage()}
+     */
+    @NotNull
+    @Deprecated // Paper
+    public String getKickMessage() {
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.message); // Paper
+    }
+
+    /**
+     * Sets the kick message to display if getResult() != Result.ALLOWED
+     *
+     * @param message New kick message
+     * @deprecated in favour of {@link #kickMessage(net.kyori.adventure.text.Component)}
+     */
+    @Deprecated // Paper
+    public void setKickMessage(@NotNull final String message) {
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
+    }
+
     /**
      * Allows the player to log in
      */
     public void allow() {
         result = Result.ALLOWED;
-        message = "";
+        message = net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     /**
@@ -112,10 +163,12 @@ public class AsyncPlayerPreLoginEvent extends Event {
      *
      * @param result New result for disallowing the player
      * @param message Kick message to display to the user
+     * @deprecated in favour of {@link #disallow(org.bukkit.event.player.AsyncPlayerPreLoginEvent.Result, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void disallow(@NotNull final Result result, @NotNull final String message) {
         this.result = result;
-        this.message = message;
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
     }
 
     /**
@@ -130,7 +183,7 @@ public class AsyncPlayerPreLoginEvent extends Event {
     @Deprecated
     public void disallow(@NotNull final PlayerPreLoginEvent.Result result, @NotNull final String message) {
         this.result = result == null ? null : Result.valueOf(result.name());
-        this.message = message;
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/event/player/PlayerChatEvent.java b/src/main/java/org/bukkit/event/player/PlayerChatEvent.java
index a1f4261eaa1497554f1e51d1d5a072c2eb9226df..2c021bc2ff18f0b3af5feb9dafc8ccebd604f8b5 100644
--- a/src/main/java/org/bukkit/event/player/PlayerChatEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerChatEvent.java
@@ -12,12 +12,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * Holds information for player chat and commands
  *
- * @deprecated This event will fire from the main thread and allows the use of
- *     all of the Bukkit API, unlike the {@link AsyncPlayerChatEvent}.
- *     <p>
- *     Listening to this event forces chat to wait for the main thread which
- *     causes delays for chat. {@link AsyncPlayerChatEvent} is the encouraged
- *     alternative for thread safe implementations.
+ * @deprecated Listening to this event forces chat to wait for the main thread, delaying chat messages. It is recommended to use {@link io.papermc.paper.event.player.AsyncChatEvent} instead, wherever possible.
  */
 @Deprecated
 @Warning(reason = "Listening to this event forces chat to wait for the main thread, delaying chat messages.")
diff --git a/src/main/java/org/bukkit/event/player/PlayerEvent.java b/src/main/java/org/bukkit/event/player/PlayerEvent.java
index 793b661b6d2d05de3d7f4fc26a4c018a2af58e62..f6d3b817de3001f04ea4554c7c39a1290af3fd6d 100644
--- a/src/main/java/org/bukkit/event/player/PlayerEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerEvent.java
@@ -14,7 +14,7 @@ public abstract class PlayerEvent extends Event {
         player = who;
     }
 
-    PlayerEvent(@NotNull final Player who, boolean async) {
+    public PlayerEvent(@NotNull final Player who, boolean async) { // Paper - public
         super(async);
         player = who;
 
diff --git a/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java b/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java
index d06684aba7688ce06777dbd837a46856a9d7767f..3e1e7cd0415509da4dd887db59efa55011b1dab4 100644
--- a/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerJoinEvent.java
@@ -10,30 +10,60 @@ import org.jetbrains.annotations.Nullable;
  */
 public class PlayerJoinEvent extends PlayerEvent {
     private static final HandlerList handlers = new HandlerList();
-    private String joinMessage;
+    // Paper start
+    private net.kyori.adventure.text.Component joinMessage;
+    public PlayerJoinEvent(@NotNull final Player playerJoined, @Nullable final net.kyori.adventure.text.Component joinMessage) {
+        super(playerJoined);
+        this.joinMessage = joinMessage;
+    }
 
+    @Deprecated // Paper end
     public PlayerJoinEvent(@NotNull final Player playerJoined, @Nullable final String joinMessage) {
         super(playerJoined);
+        this.joinMessage = joinMessage != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(joinMessage) : null; // Paper end
+    }
+
+    // Paper start
+    /**
+     * Gets the join message to send to all online players
+     *
+     * @return string join message. Can be null
+     */
+    public net.kyori.adventure.text.@Nullable Component joinMessage() {
+        return this.joinMessage;
+    }
+
+    /**
+     * Sets the join message to send to all online players
+     *
+     * @param joinMessage join message. If null, no message will be sent
+     */
+    public void joinMessage(net.kyori.adventure.text.@Nullable Component joinMessage) {
         this.joinMessage = joinMessage;
     }
+    // Paper end
 
     /**
      * Gets the join message to send to all online players
      *
      * @return string join message. Can be null
+     * @deprecated in favour of {@link #joinMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getJoinMessage() {
-        return joinMessage;
+        return this.joinMessage == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.joinMessage); // Paper
     }
 
     /**
      * Sets the join message to send to all online players
      *
      * @param joinMessage join message. If null, no message will be sent
+     * @deprecated in favour of {@link #joinMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setJoinMessage(@Nullable String joinMessage) {
-        this.joinMessage = joinMessage;
+        this.joinMessage = joinMessage != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(joinMessage) : null; // Paper
     }
 
     @NotNull
diff --git a/src/main/java/org/bukkit/event/player/PlayerKickEvent.java b/src/main/java/org/bukkit/event/player/PlayerKickEvent.java
index 2f6ca42330675733b2b4132cbb66e433788d05d5..997b06c19a5277656521e0e298f2958c209f1da1 100644
--- a/src/main/java/org/bukkit/event/player/PlayerKickEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerKickEvent.java
@@ -10,35 +10,84 @@ import org.jetbrains.annotations.NotNull;
  */
 public class PlayerKickEvent extends PlayerEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
-    private String leaveMessage;
-    private String kickReason;
+    private net.kyori.adventure.text.Component leaveMessage; // Paper
+    private net.kyori.adventure.text.Component kickReason; // Paper
     private boolean cancel;
 
+    @Deprecated // Paper
     public PlayerKickEvent(@NotNull final Player playerKicked, @NotNull final String kickReason, @NotNull final String leaveMessage) {
+        super(playerKicked);
+        this.kickReason = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(kickReason); // Paper
+        this.leaveMessage = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(leaveMessage); // Paper
+        this.cancel = false;
+    }
+    // Paper start
+    public PlayerKickEvent(@NotNull final Player playerKicked, @NotNull final net.kyori.adventure.text.Component kickReason, @NotNull final net.kyori.adventure.text.Component leaveMessage) {
         super(playerKicked);
         this.kickReason = kickReason;
         this.leaveMessage = leaveMessage;
         this.cancel = false;
     }
 
+    /**
+     * Gets the leave message send to all online players
+     *
+     * @return string kick reason
+     */
+    public net.kyori.adventure.text.@NotNull Component leaveMessage() {
+        return this.leaveMessage;
+    }
+
+    /**
+     * Sets the leave message send to all online players
+     *
+     * @param leaveMessage leave message
+     */
+    public void leaveMessage(net.kyori.adventure.text.@NotNull Component leaveMessage) {
+        this.leaveMessage = leaveMessage;
+    }
+
     /**
      * Gets the reason why the player is getting kicked
      *
      * @return string kick reason
      */
+    public net.kyori.adventure.text.@NotNull Component reason() {
+        return this.kickReason;
+    }
+
+    /**
+     * Sets the reason why the player is getting kicked
+     *
+     * @param kickReason kick reason
+     */
+    public void reason(net.kyori.adventure.text.@NotNull Component kickReason) {
+        this.kickReason = kickReason;
+    }
+    // Paper end
+
+    /**
+     * Gets the reason why the player is getting kicked
+     *
+     * @return string kick reason
+     * @deprecated in favour of {@link #reason()}
+     */
     @NotNull
+    @Deprecated // Paper
     public String getReason() {
-        return kickReason;
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.kickReason); // Paper
     }
 
     /**
      * Gets the leave message send to all online players
      *
      * @return string kick reason
+     * @deprecated in favour of {@link #leaveMessage()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLeaveMessage() {
-        return leaveMessage;
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.leaveMessage); // Paper
     }
 
     @Override
@@ -55,18 +104,22 @@ public class PlayerKickEvent extends PlayerEvent implements Cancellable {
      * Sets the reason why the player is getting kicked
      *
      * @param kickReason kick reason
+     * @deprecated in favour of {@link #reason(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setReason(@NotNull String kickReason) {
-        this.kickReason = kickReason;
+        this.kickReason = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(kickReason); // Paper
     }
 
     /**
      * Sets the leave message send to all online players
      *
      * @param leaveMessage leave message
+     * @deprecated in favour of {@link #leaveMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setLeaveMessage(@NotNull String leaveMessage) {
-        this.leaveMessage = leaveMessage;
+        this.leaveMessage = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(leaveMessage); // Paper
     }
 
     @NotNull
diff --git a/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java b/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java
index 36b436e145a7215682b692a87ab894df25752c1d..c5e8bffef736365881953161ff812c98adf93a80 100644
--- a/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerLocaleChangeEvent.java
@@ -12,17 +12,31 @@ public class PlayerLocaleChangeEvent extends PlayerEvent {
     private static final HandlerList handlers = new HandlerList();
     //
     private final String locale;
+    // Paper start
+    private final java.util.Locale adventure$locale;
+    /**
+     * @see Player#locale()
+     *
+     * @return the player's new locale
+     */
+    public @NotNull java.util.Locale locale() {
+        return this.adventure$locale;
+    }
+    // Paper end
 
     public PlayerLocaleChangeEvent(@NotNull Player who, @NotNull String locale) {
         super(who);
         this.locale = locale;
+        this.adventure$locale = net.kyori.adventure.translation.Translator.parseLocale(locale); // Paper
     }
 
     /**
      * @return the player's new locale
      * @see Player#getLocale()
+     * @deprecated in favour of {@link #locale()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getLocale() {
         return locale;
     }
diff --git a/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java b/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java
index 084ca8cfcb7381bfa4fa6280748cf9b81210a9c1..62fb782baad5c80a3daaa557c0faa674c58a98cf 100644
--- a/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerLoginEvent.java
@@ -17,7 +17,7 @@ public class PlayerLoginEvent extends PlayerEvent {
     private final InetAddress address;
     private final String hostname;
     private Result result = Result.ALLOWED;
-    private String message = "";
+    private net.kyori.adventure.text.Component message = net.kyori.adventure.text.Component.empty();
     private final InetAddress realAddress; // Spigot
 
     /**
@@ -53,12 +53,52 @@ public class PlayerLoginEvent extends PlayerEvent {
      * @param result The result status for this event
      * @param message The message to be displayed if result denies login
      * @param realAddress the actual, unspoofed connecting address
+     * @deprecated in favour of {@link #PlayerLoginEvent(Player, String, InetAddress, Result, net.kyori.adventure.text.Component, InetAddress)}
      */
+    @Deprecated // Paper
     public PlayerLoginEvent(@NotNull final Player player, @NotNull String hostname, @NotNull final InetAddress address, @NotNull final Result result, @NotNull final String message, @NotNull final InetAddress realAddress) { // Spigot
         this(player, hostname, address, realAddress); // Spigot
         this.result = result;
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
+    }
+
+    // Paper start
+    /**
+     * This constructor pre-configures the event with a result and message
+     *
+     * @param player The {@link Player} for this event
+     * @param hostname The hostname that was used to connect to the server
+     * @param address The address the player used to connect, provided for
+     *     timing issues
+     * @param result The result status for this event
+     * @param message The message to be displayed if result denies login
+     * @param realAddress the actual, unspoofed connecting address
+     */
+    public PlayerLoginEvent(@NotNull final Player player, @NotNull String hostname, @NotNull final InetAddress address, @NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message, @NotNull final InetAddress realAddress) { // Spigot
+        this(player, hostname, address, realAddress); // Spigot
+        this.result = result;
+        this.message = message;
+    }
+
+    /**
+     * Gets the current kick message that will be used if getResult() !=
+     * Result.ALLOWED
+     *
+     * @return Current kick message
+     */
+    public net.kyori.adventure.text.@NotNull Component kickMessage() {
+        return this.message;
+    }
+
+    /**
+     * Sets the kick message to display if getResult() != Result.ALLOWED
+     *
+     * @param message New kick message
+     */
+    public void kickMessage(net.kyori.adventure.text.@NotNull Component message) {
         this.message = message;
     }
+    // Paper end
 
     // Spigot start
     /**
@@ -96,19 +136,23 @@ public class PlayerLoginEvent extends PlayerEvent {
      * Result.ALLOWED
      *
      * @return Current kick message
+     * @deprecated in favour of {@link #kickMessage()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getKickMessage() {
-        return message;
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.message); // Paper
     }
 
     /**
      * Sets the kick message to display if getResult() != Result.ALLOWED
      *
      * @param message New kick message
+     * @deprecated in favour of {@link #kickMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setKickMessage(@NotNull final String message) {
-        this.message = message;
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
     }
 
     /**
@@ -127,7 +171,7 @@ public class PlayerLoginEvent extends PlayerEvent {
      */
     public void allow() {
         result = Result.ALLOWED;
-        message = "";
+        message = net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     /**
@@ -135,8 +179,21 @@ public class PlayerLoginEvent extends PlayerEvent {
      *
      * @param result New result for disallowing the player
      * @param message Kick message to display to the user
+     * @deprecated in favour of {@link #disallow(Result, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper start
     public void disallow(@NotNull final Result result, @NotNull final String message) {
+        this.result = result;
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message);
+    }
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     */
+    public void disallow(@NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        // Paper end
         this.result = result;
         this.message = message;
     }
diff --git a/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java b/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java
index fb066251f793ec3b41bfc075b9478901b15ee549..6800132c6288b4588fd02b08d26f016c38f27129 100644
--- a/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerPreLoginEvent.java
@@ -19,7 +19,7 @@ import org.jetbrains.annotations.NotNull;
 public class PlayerPreLoginEvent extends Event {
     private static final HandlerList handlers = new HandlerList();
     private Result result;
-    private String message;
+    private net.kyori.adventure.text.Component message; // Paper
     private final String name;
     private final InetAddress ipAddress;
     private final UUID uniqueId;
@@ -31,7 +31,7 @@ public class PlayerPreLoginEvent extends Event {
 
     public PlayerPreLoginEvent(@NotNull final String name, @NotNull final InetAddress ipAddress, @NotNull final UUID uniqueId) {
         this.result = Result.ALLOWED;
-        this.message = "";
+        this.message = net.kyori.adventure.text.Component.empty(); // Paper
         this.name = name;
         this.ipAddress = ipAddress;
         this.uniqueId = uniqueId;
@@ -56,6 +56,7 @@ public class PlayerPreLoginEvent extends Event {
         this.result = result;
     }
 
+    // Paper start
     /**
      * Gets the current kick message that will be used if getResult() !=
      * Result.ALLOWED
@@ -63,7 +64,7 @@ public class PlayerPreLoginEvent extends Event {
      * @return Current kick message
      */
     @NotNull
-    public String getKickMessage() {
+    public net.kyori.adventure.text.Component kickMessage() {
         return message;
     }
 
@@ -72,16 +73,51 @@ public class PlayerPreLoginEvent extends Event {
      *
      * @param message New kick message
      */
-    public void setKickMessage(@NotNull final String message) {
+    public void kickMessage(@NotNull final net.kyori.adventure.text.Component message) {
         this.message = message;
     }
 
+    /**
+     * Disallows the player from logging in, with the given reason
+     *
+     * @param result New result for disallowing the player
+     * @param message Kick message to display to the user
+     */
+    public void disallow(@NotNull final Result result, @NotNull final net.kyori.adventure.text.Component message) {
+        this.result = result;
+        this.message = message;
+    }
+    // Paper end
+    /**
+     * Gets the current kick message that will be used if getResult() !=
+     * Result.ALLOWED
+     *
+     * @return Current kick message
+     * @deprecated in favour of {@link #kickMessage()}
+     */
+    @Deprecated // Paper
+    @NotNull
+    public String getKickMessage() {
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.message); // Paper
+    }
+
+    /**
+     * Sets the kick message to display if getResult() != Result.ALLOWED
+     *
+     * @param message New kick message
+     * @deprecated in favour of {@link #kickMessage(net.kyori.adventure.text.Component)}
+     */
+    @Deprecated // Paper
+    public void setKickMessage(@NotNull final String message) {
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
+    }
+
     /**
      * Allows the player to log in
      */
     public void allow() {
         result = Result.ALLOWED;
-        message = "";
+        message = net.kyori.adventure.text.Component.empty(); // Paper
     }
 
     /**
@@ -89,10 +125,12 @@ public class PlayerPreLoginEvent extends Event {
      *
      * @param result New result for disallowing the player
      * @param message Kick message to display to the user
+     * @deprecated in favour of {@link #disallow(org.bukkit.event.player.PlayerPreLoginEvent.Result, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void disallow(@NotNull final Result result, @NotNull final String message) {
         this.result = result;
-        this.message = message;
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java b/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java
index d70c25f404e994766a9ebce89a917c8d0719777c..14b27eaaf744736b3e56bb1383481df98a218c43 100644
--- a/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerQuitEvent.java
@@ -10,30 +10,59 @@ import org.jetbrains.annotations.Nullable;
  */
 public class PlayerQuitEvent extends PlayerEvent {
     private static final HandlerList handlers = new HandlerList();
-    private String quitMessage;
+    private net.kyori.adventure.text.Component quitMessage; // Paper
 
+    @Deprecated // Paper
     public PlayerQuitEvent(@NotNull final Player who, @Nullable final String quitMessage) {
         super(who);
+        this.quitMessage = quitMessage != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(quitMessage) : null; // Paper
+    }
+    // Paper start
+    public PlayerQuitEvent(@NotNull final Player who, @Nullable final net.kyori.adventure.text.Component quitMessage) {
+        super(who);
+        this.quitMessage = quitMessage;
+    }
+
+    /**
+     * Gets the quit message to send to all online players
+     *
+     * @return string quit message
+     */
+    public net.kyori.adventure.text.@Nullable Component quitMessage() {
+        return quitMessage;
+    }
+
+    /**
+     * Sets the quit message to send to all online players
+     *
+     * @param quitMessage quit message
+     */
+    public void quitMessage(net.kyori.adventure.text.@Nullable Component quitMessage) {
         this.quitMessage = quitMessage;
     }
+    // Paper end
 
     /**
      * Gets the quit message to send to all online players
      *
      * @return string quit message
+     * @deprecated in favour of {@link #quitMessage()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getQuitMessage() {
-        return quitMessage;
+        return this.quitMessage == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.quitMessage); // Paper
     }
 
     /**
      * Sets the quit message to send to all online players
      *
      * @param quitMessage quit message
+     * @deprecated in favour of {@link #quitMessage(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setQuitMessage(@Nullable String quitMessage) {
-        this.quitMessage = quitMessage;
+        this.quitMessage = quitMessage != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(quitMessage) : null; // Paper
     }
 
     @NotNull
diff --git a/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java b/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java
index 03bfca9d368bbe4b7c1353d52c883e756bf69bda..25c0fe98489d903fdf77cbdd181c95593bd7f727 100644
--- a/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java
+++ b/src/main/java/org/bukkit/event/server/BroadcastMessageEvent.java
@@ -9,16 +9,16 @@ import org.jetbrains.annotations.NotNull;
 
 /**
  * Event triggered for server broadcast messages such as from
- * {@link org.bukkit.Server#broadcast(String, String)}.
+ * {@link org.bukkit.Server#broadcast(net.kyori.adventure.text.Component)} (String, String)}.
  *
- * <b>This event behaves similarly to {@link AsyncPlayerChatEvent} in that it
+ * <b>This event behaves similarly to {@link io.papermc.paper.event.player.AsyncChatEvent} in that it
  * should be async if fired from an async thread. Please see that event for
  * further information.</b>
  */
 public class BroadcastMessageEvent extends ServerEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
-    private String message;
+    private net.kyori.adventure.text.Component message; // Paper
     private final Set<CommandSender> recipients;
     private boolean cancelled = false;
 
@@ -27,29 +27,66 @@ public class BroadcastMessageEvent extends ServerEvent implements Cancellable {
         this(false, message, recipients);
     }
 
+    @Deprecated // Paper
     public BroadcastMessageEvent(boolean isAsync, @NotNull String message, @NotNull Set<CommandSender> recipients) {
+        // Paper start
+        super(isAsync);
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message);
+        this.recipients = recipients;
+    }
+
+    @Deprecated
+    public BroadcastMessageEvent(net.kyori.adventure.text.@NotNull Component message, @NotNull Set<CommandSender> recipients) {
+        this(false, message, recipients);
+    }
+
+    public BroadcastMessageEvent(boolean isAsync, net.kyori.adventure.text.@NotNull Component message, @NotNull Set<CommandSender> recipients) {
+        // Paper end
         super(isAsync);
         this.message = message;
         this.recipients = recipients;
     }
+    // Paper start
+    /**
+     * Get the broadcast message.
+     *
+     * @return Message to broadcast
+     */
+    public net.kyori.adventure.text.@NotNull Component message() {
+        return this.message;
+    }
+
+    /**
+     * Set the broadcast message.
+     *
+     * @param message New message to broadcast
+     */
+    public void message(net.kyori.adventure.text.@NotNull Component message) {
+        this.message = message;
+    }
+    // Paper end
 
     /**
      * Get the message to broadcast.
      *
      * @return Message to broadcast
+     * @deprecated in favour of {@link #message()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getMessage() {
-        return message;
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.message); // Paper
     }
 
     /**
      * Set the message to broadcast.
      *
      * @param message New message to broadcast
+     * @deprecated in favour of {@link #message(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setMessage(@NotNull String message) {
-        this.message = message;
+        this.message = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/event/server/ServerListPingEvent.java b/src/main/java/org/bukkit/event/server/ServerListPingEvent.java
index 5adbe0514129abf3cfbc4b29a213f522359fe2e1..72ebc29db42d08d1d0361dba462fc8a573fbf918 100644
--- a/src/main/java/org/bukkit/event/server/ServerListPingEvent.java
+++ b/src/main/java/org/bukkit/event/server/ServerListPingEvent.java
@@ -22,7 +22,7 @@ public class ServerListPingEvent extends ServerEvent implements Iterable<Player>
     private static final HandlerList handlers = new HandlerList();
     private final String hostname;
     private final InetAddress address;
-    private String motd;
+    private net.kyori.adventure.text.Component motd; // Paper
     private final int numPlayers;
     private int maxPlayers;
 
@@ -31,7 +31,7 @@ public class ServerListPingEvent extends ServerEvent implements Iterable<Player>
         Preconditions.checkArgument(numPlayers >= 0, "Cannot have negative number of players online", numPlayers);
         this.hostname = hostname;
         this.address = address;
-        this.motd = motd;
+        this.motd = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(motd); // Paper
         this.numPlayers = numPlayers;
         this.maxPlayers = maxPlayers;
     }
@@ -45,15 +45,80 @@ public class ServerListPingEvent extends ServerEvent implements Iterable<Player>
      * @param address the address of the pinger
      * @param motd the message of the day
      * @param maxPlayers the max number of players
+     * @deprecated in favour of {@link #ServerListPingEvent(String, java.net.InetAddress, net.kyori.adventure.text.Component, int)}
      */
+    @Deprecated // Paper
     protected ServerListPingEvent(@NotNull final String hostname, @NotNull final InetAddress address, @NotNull final String motd, final int maxPlayers) {
         super(true);
         this.numPlayers = MAGIC_PLAYER_COUNT;
         this.hostname = hostname;
         this.address = address;
+        this.motd = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(motd); // Paper
+        this.maxPlayers = maxPlayers;
+    }
+    // Paper start
+    @Deprecated
+    public ServerListPingEvent(@NotNull final InetAddress address, @NotNull final net.kyori.adventure.text.Component motd, final int numPlayers, final int maxPlayers) {
+        this("", address, motd, numPlayers, maxPlayers);
+    }
+    public ServerListPingEvent(@NotNull final String hostname, @NotNull final InetAddress address, @NotNull final net.kyori.adventure.text.Component motd, final int numPlayers, final int maxPlayers) {
+        super(true);
+        Preconditions.checkArgument(numPlayers >= 0, "Cannot have negative number of players online (%s)", numPlayers);
+        this.hostname = hostname;
+        this.address = address;
         this.motd = motd;
+        this.numPlayers = numPlayers;
         this.maxPlayers = maxPlayers;
     }
+    /**
+     * This constructor is intended for implementations that provide the
+     * {@link #iterator()} method, thus provided the {@link #getNumPlayers()}
+     * count.
+     *
+     * @param address the address of the pinger
+     * @param motd the message of the day
+     * @param maxPlayers the max number of players
+     * @deprecated in favour of {@link #ServerListPingEvent(String, java.net.InetAddress, net.kyori.adventure.text.Component, int)}
+     */
+    @Deprecated
+    protected ServerListPingEvent(@NotNull final InetAddress address, @NotNull final net.kyori.adventure.text.Component motd, final int maxPlayers) {
+        this("", address, motd, maxPlayers);
+    }
+
+    /**
+     * This constructor is intended for implementations that provide the
+     * {@link #iterator()} method, thus provided the {@link #getNumPlayers()}
+     * count.
+     *
+     * @param hostname The hostname that was used to connect to the server
+     * @param address the address of the pinger
+     * @param motd the message of the day
+     * @param maxPlayers the max number of players
+     */
+    protected ServerListPingEvent(final @NotNull String hostname, final @NotNull InetAddress address, final net.kyori.adventure.text.@NotNull Component motd, final int maxPlayers) {
+        this.numPlayers = MAGIC_PLAYER_COUNT;
+        this.hostname = hostname;
+        this.address = address;
+        this.motd = motd;
+        this.maxPlayers = maxPlayers;
+    }
+    /**
+     * Get the message of the day message.
+     *
+     * @return the message of the day
+     */
+    public net.kyori.adventure.text.@NotNull Component motd() {
+        return motd;
+    }
+    /**
+     * Change the message of the day message.
+     *
+     * @param motd the message of the day
+     */
+    public void motd(net.kyori.adventure.text.@NotNull Component motd) {
+        this.motd = motd;
+    }
+    // Paper end
 
     /**
      * Gets the hostname that the player used to connect to the server, or
@@ -80,19 +145,23 @@ public class ServerListPingEvent extends ServerEvent implements Iterable<Player>
      * Get the message of the day message.
      *
      * @return the message of the day
+     * @deprecated in favour of {@link #motd()}
      */
     @NotNull
+    @Deprecated // Paper
     public String getMotd() {
-        return motd;
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.motd); // Paper
     }
 
     /**
      * Change the message of the day message.
      *
      * @param motd the message of the day
+     * @deprecated in favour of {@link #motd(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setMotd(@NotNull String motd) {
-        this.motd = motd;
+        this.motd = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(motd); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/InventoryView.java b/src/main/java/org/bukkit/inventory/InventoryView.java
index e12996492c1558fed9fab30de9f8018e0ed7fac3..002acfbdce1db10f7ba1b6a013e678f504ac6e69 100644
--- a/src/main/java/org/bukkit/inventory/InventoryView.java
+++ b/src/main/java/org/bukkit/inventory/InventoryView.java
@@ -447,12 +447,26 @@ public abstract class InventoryView {
         return getPlayer().setWindowProperty(prop, value);
     }
 
+    // Paper start
     /**
      * Get the title of this inventory window.
      *
      * @return The title.
      */
     @NotNull
+    public /*abstract*/ net.kyori.adventure.text.Component title() {
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(this.getTitle());
+    }
+    // Paper end
+
+    /**
+     * Get the title of this inventory window.
+     *
+     * @return The title.
+     * @deprecated in favour of {@link #title()}
+     */
+    @Deprecated // Paper
+    @NotNull
     public abstract String getTitle();
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/ItemFactory.java b/src/main/java/org/bukkit/inventory/ItemFactory.java
index e606f63a284db71663aee667597447b875e20627..6b1c55249b39a45c33ac49bacef4e9d80ba8cc3a 100644
--- a/src/main/java/org/bukkit/inventory/ItemFactory.java
+++ b/src/main/java/org/bukkit/inventory/ItemFactory.java
@@ -217,4 +217,24 @@ public interface ItemFactory {
      */
     @NotNull
     ItemStack enchantItem(@NotNull final ItemStack item, final int level, final boolean allowTreasures);
+
+    // Paper start - Adventure
+    /**
+     * Creates a hover event for the given item.
+     *
+     * @param item The item
+     * @return A hover event
+     */
+    @NotNull
+    net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowItem> asHoverEvent(final @NotNull ItemStack item, final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowItem> op);
+
+    /**
+     * Get the formatted display name of the {@link ItemStack}.
+     *
+     * @param itemStack the {@link ItemStack}
+     * @return display name of the {@link ItemStack}
+     */
+    @NotNull
+    net.kyori.adventure.text.Component displayName(@NotNull ItemStack itemStack);
+    // Paper end - Adventure
 }
diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
index d80b0a52968920b990a75cff85e436a16d782500..9d327f0832c40d4a8d212346284274f6cf78834f 100644
--- a/src/main/java/org/bukkit/inventory/ItemStack.java
+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
@@ -23,7 +23,7 @@ import org.jetbrains.annotations.Nullable;
  * use this class to encapsulate Materials for which {@link Material#isItem()}
  * returns false.</b>
  */
-public class ItemStack implements Cloneable, ConfigurationSerializable, Translatable {
+public class ItemStack implements Cloneable, ConfigurationSerializable, Translatable, net.kyori.adventure.text.event.HoverEventSource<net.kyori.adventure.text.event.HoverEvent.ShowItem> { // Paper
     private Material type = Material.AIR;
     private int amount = 0;
     private MaterialData data = null;
@@ -602,4 +602,21 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
     public String getTranslationKey() {
         return Bukkit.getUnsafe().getTranslationKey(this);
     }
+
+    // Paper start
+    @NotNull
+    @Override
+    public net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowItem> asHoverEvent(final @NotNull java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowItem> op) {
+        return org.bukkit.Bukkit.getServer().getItemFactory().asHoverEvent(this, op);
+    }
+
+    /**
+     * Get the formatted display name of the {@link ItemStack}.
+     *
+     * @return display name of the {@link ItemStack}
+     */
+    public net.kyori.adventure.text.@NotNull Component displayName() {
+        return Bukkit.getServer().getItemFactory().displayName(this);
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/inventory/meta/BookMeta.java b/src/main/java/org/bukkit/inventory/meta/BookMeta.java
index 94852d50e88d0594b84b581cd627174043629995..be7c2cfc757e4dd15927be850739d401958fb227 100644
--- a/src/main/java/org/bukkit/inventory/meta/BookMeta.java
+++ b/src/main/java/org/bukkit/inventory/meta/BookMeta.java
@@ -10,7 +10,7 @@ import org.jetbrains.annotations.Nullable;
  * Represents a book ({@link Material#WRITABLE_BOOK} or {@link
  * Material#WRITTEN_BOOK}) that can have a title, an author, and pages.
  */
-public interface BookMeta extends ItemMeta {
+public interface BookMeta extends ItemMeta, net.kyori.adventure.inventory.Book { // Paper
 
     /**
      * Represents the generation (or level of copying) of a written book
@@ -119,6 +119,109 @@ public interface BookMeta extends ItemMeta {
      */
     boolean hasPages();
 
+    // Paper start
+    /**
+     * Gets the title of the book.
+     * <p>
+     * Plugins should check that hasTitle() returns true before calling this
+     * method.
+     *
+     * @return the title of the book
+     */
+    @Override
+    net.kyori.adventure.text.@Nullable Component title();
+
+    /**
+     * Sets the title of the book.
+     * <p>
+     * Limited to 32 characters. Removes title when given null.
+     *
+     * @param title the title to set
+     * @return the same {@link BookMeta} instance
+     */
+    @org.jetbrains.annotations.Contract(value = "_ -> this", pure = false)
+    @Override
+    @NotNull BookMeta title(net.kyori.adventure.text.@Nullable Component title);
+
+    /**
+     * Gets the author of the book.
+     * <p>
+     * Plugins should check that hasAuthor() returns true before calling this
+     * method.
+     *
+     * @return the author of the book
+     */
+    @Override
+    net.kyori.adventure.text.@Nullable Component author();
+
+    /**
+     * Sets the author of the book. Removes author when given null.
+     *
+     * @param author the author to set
+     * @return the same {@link BookMeta} instance
+     */
+    @org.jetbrains.annotations.Contract(value = "_ -> this", pure = false)
+    @Override
+    @NotNull BookMeta author(net.kyori.adventure.text.@Nullable Component author);
+
+    /**
+     * Gets the specified page in the book. The page must exist.
+     * <p>
+     * Pages are 1-indexed.
+     *
+     * @param page the page number to get, in range [1, getPageCount()]
+     * @return the page from the book
+     */
+    net.kyori.adventure.text.@NotNull Component page(int page);
+
+    /**
+     * Sets the specified page in the book. Pages of the book must be
+     * contiguous.
+     * <p>
+     * The data can be up to 256 characters in length, additional characters
+     * are truncated.
+     * <p>
+     * Pages are 1-indexed.
+     *
+     * @param page the page number to set, in range [1, getPageCount()]
+     * @param data the data to set for that page
+     */
+    void page(int page, net.kyori.adventure.text.@NotNull Component data);
+
+    /**
+     * Adds new pages to the end of the book. Up to a maximum of 50 pages with
+     * 256 characters per page.
+     *
+     * @param pages A list of strings, each being a page
+     */
+    void addPages(net.kyori.adventure.text.@NotNull Component @NotNull ... pages);
+
+    interface BookMetaBuilder extends Builder {
+
+        @Override
+        @NotNull BookMetaBuilder title(net.kyori.adventure.text.@Nullable Component title);
+
+        @Override
+        @NotNull BookMetaBuilder author(net.kyori.adventure.text.@Nullable Component author);
+
+        @Override
+        @NotNull BookMetaBuilder addPage(net.kyori.adventure.text.@NotNull Component page);
+
+        @Override
+        @NotNull BookMetaBuilder pages(net.kyori.adventure.text.@NotNull Component @NotNull ... pages);
+
+        @Override
+        @NotNull BookMetaBuilder pages(java.util.@NotNull Collection<net.kyori.adventure.text.Component> pages);
+
+        @Override
+        @NotNull BookMeta build();
+    }
+
+    @Override
+    @NotNull BookMetaBuilder toBuilder();
+
+    // Paper end
+
     /**
      * Gets the specified page in the book. The given page must exist.
      * <p>
@@ -126,8 +229,10 @@ public interface BookMeta extends ItemMeta {
      *
      * @param page the page number to get, in range [1, getPageCount()]
      * @return the page from the book
+     * @deprecated in favour of {@link #page(int)}
      */
     @NotNull
+    @Deprecated // Paper
     String getPage(int page);
 
     /**
@@ -141,15 +246,19 @@ public interface BookMeta extends ItemMeta {
      *
      * @param page the page number to set, in range [1, getPageCount()]
      * @param data the data to set for that page
+     * @deprecated in favour of {@link #page(int, net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setPage(int page, @NotNull String data);
 
     /**
      * Gets all the pages in the book.
      *
      * @return list of all the pages in the book
+     * @deprecated in favour of {@link #pages()}
      */
     @NotNull
+    @Deprecated // Paper
     List<String> getPages();
 
     /**
@@ -157,7 +266,9 @@ public interface BookMeta extends ItemMeta {
      * pages. Maximum 100 pages with 256 characters per page.
      *
      * @param pages A list of pages to set the book to use
+     * @deprecated in favour of {@link #pages(List)}
      */
+    @Deprecated // Paper
     void setPages(@NotNull List<String> pages);
 
     /**
@@ -165,7 +276,9 @@ public interface BookMeta extends ItemMeta {
      * pages. Maximum 50 pages with 256 characters per page.
      *
      * @param pages A list of strings, each being a page
+     * @deprecated in favour of {@link #pages(net.kyori.adventure.text.Component...)}
      */
+    @Deprecated // Paper
     void setPages(@NotNull String... pages);
 
     /**
@@ -173,7 +286,9 @@ public interface BookMeta extends ItemMeta {
      * 256 characters per page.
      *
      * @param pages A list of strings, each being a page
+     * @deprecated in favour of {@link #addPages(net.kyori.adventure.text.Component...)}
      */
+    @Deprecated // Paper
     void addPage(@NotNull String... pages);
 
     /**
@@ -195,8 +310,10 @@ public interface BookMeta extends ItemMeta {
          *
          * @param page the page number to get
          * @return the page from the book
+         * @deprecated in favour of {@link #page(int)}
          */
         @NotNull
+        @Deprecated // Paper
         public BaseComponent[] getPage(int page) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -210,7 +327,9 @@ public interface BookMeta extends ItemMeta {
          *
          * @param page the page number to set
          * @param data the data to set for that page
+         * @deprecated in favour of {@link #page(int, net.kyori.adventure.text.Component)}
          */
+        @Deprecated // Paper
         public void setPage(int page, @Nullable BaseComponent... data) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -219,8 +338,10 @@ public interface BookMeta extends ItemMeta {
          * Gets all the pages in the book.
          *
          * @return list of all the pages in the book
+         * @deprecated in favour of {@link #pages()}
          */
         @NotNull
+        @Deprecated // Paper
         public List<BaseComponent[]> getPages() {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -230,7 +351,9 @@ public interface BookMeta extends ItemMeta {
          * pages. Maximum 50 pages with 256 characters per page.
          *
          * @param pages A list of pages to set the book to use
+         * @deprecated in favour of {@link #pages(java.util.List)}
          */
+        @Deprecated // Paper
         public void setPages(@NotNull List<BaseComponent[]> pages) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -240,7 +363,9 @@ public interface BookMeta extends ItemMeta {
          * pages. Maximum 50 pages with 256 characters per page.
          *
          * @param pages A list of component arrays, each being a page
+         * @deprecated in favour of {@link #pages(net.kyori.adventure.text.Component...)}
          */
+        @Deprecated // Paper
         public void setPages(@NotNull BaseComponent[]... pages) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
@@ -250,7 +375,9 @@ public interface BookMeta extends ItemMeta {
          * with 256 characters per page.
          *
          * @param pages A list of component arrays, each being a page
+         * @deprecated in favour of {@link #addPages(net.kyori.adventure.text.Component...)}
          */
+        @Deprecated // Paper
         public void addPage(@NotNull BaseComponent[]... pages) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
diff --git a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
index 8ca9605fc1193de9277407f02f755d81190472a4..d7fab2b856f6dfec4f9225c1bdb4254b238d98a4 100644
--- a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
+++ b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
@@ -32,6 +32,24 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      */
     boolean hasDisplayName();
 
+    // Paper start
+    /**
+     * Gets the display name.
+     *
+     * <p>Plugins should check that {@link #hasDisplayName()} returns <code>true</code> before calling this method.</p>
+     *
+     * @return the display name
+     */
+    net.kyori.adventure.text.@Nullable Component displayName();
+
+    /**
+     * Sets the display name.
+     *
+     * @param displayName the display name to set
+     */
+    void displayName(final net.kyori.adventure.text.@Nullable Component displayName);
+    // Paper end
+
     /**
      * Gets the display name that is set.
      * <p>
@@ -39,7 +57,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * before calling this method.
      *
      * @return the display name that is set
+     * @deprecated in favour of {@link #displayName()}
      */
+    @Deprecated // Paper
     @NotNull
     String getDisplayName();
 
@@ -47,7 +67,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * Sets the display name.
      *
      * @param name the name to set
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setDisplayName(@Nullable String name);
 
     /**
@@ -82,6 +104,24 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      */
     boolean hasLore();
 
+    // Paper start
+    /**
+     * Gets the lore.
+     *
+     * <p>Plugins should check that {@link #hasLore()} returns <code>true</code> before calling this method.</p>
+     *
+     * @return the lore
+     */
+    @Nullable List<net.kyori.adventure.text.Component> lore();
+
+    /**
+     * Sets the lore.
+     *
+     * @param lore the lore to set
+     */
+    void lore(final @Nullable List<? extends net.kyori.adventure.text.Component> lore);
+    // Paper end
+
     /**
      * Gets the lore that is set.
      * <p>
@@ -89,7 +129,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * calling this method.
      *
      * @return a list of lore that is set
+     * @deprecated in favour of {@link #lore()}
      */
+    @Deprecated // Paper
     @Nullable
     List<String> getLore();
 
@@ -98,7 +140,9 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * Removes lore when given null.
      *
      * @param lore the lore that will be set
+     * @deprecated in favour of {@link #lore(List)}
      */
+    @Deprecated // Paper
     void setLore(@Nullable List<String> lore);
 
     /**
diff --git a/src/main/java/org/bukkit/map/MapCursor.java b/src/main/java/org/bukkit/map/MapCursor.java
index b90fd819a781d3a2117ffa25f0864b1576901f9f..7d4f4970dae6fe4eeea6b6b6810dcecfe20d6e51 100644
--- a/src/main/java/org/bukkit/map/MapCursor.java
+++ b/src/main/java/org/bukkit/map/MapCursor.java
@@ -10,7 +10,7 @@ public final class MapCursor {
     private byte x, y;
     private byte direction, type;
     private boolean visible;
-    private String caption;
+    private net.kyori.adventure.text.Component caption; // Paper
 
     /**
      * Initialize the map cursor.
@@ -24,7 +24,7 @@ public final class MapCursor {
      */
     @Deprecated
     public MapCursor(byte x, byte y, byte direction, byte type, boolean visible) {
-        this(x, y, direction, type, visible, null);
+        this(x, y, direction, type, visible, (String) null); // Paper
     }
 
     /**
@@ -37,7 +37,7 @@ public final class MapCursor {
      * @param visible Whether the cursor is visible by default.
      */
     public MapCursor(byte x, byte y, byte direction, @NotNull Type type, boolean visible) {
-        this(x, y, direction, type, visible, null);
+        this(x, y, direction, type, visible, (String) null); // Paper
     }
 
     /**
@@ -49,7 +49,7 @@ public final class MapCursor {
      * @param type The type (color/style) of the map cursor.
      * @param visible Whether the cursor is visible by default.
      * @param caption cursor caption
-     * @deprecated Magic value
+     * @deprecated Magic value. Use {@link #MapCursor(byte, byte, byte, byte, boolean, net.kyori.adventure.text.Component)}
      */
     @Deprecated
     public MapCursor(byte x, byte y, byte direction, byte type, boolean visible, @Nullable String caption) {
@@ -58,8 +58,42 @@ public final class MapCursor {
         setDirection(direction);
         setRawType(type);
         this.visible = visible;
-        this.caption = caption;
+        this.caption = caption == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(caption); // Paper
     }
+    // Paper start
+    /**
+     * Initialize the map cursor.
+     *
+     * @param x The x coordinate, from -128 to 127.
+     * @param y The y coordinate, from -128 to 127.
+     * @param direction The facing of the cursor, from 0 to 15.
+     * @param type The type (color/style) of the map cursor.
+     * @param visible Whether the cursor is visible by default.
+     * @param caption cursor caption
+     * @deprecated Magic value
+     */
+    @Deprecated
+    public MapCursor(byte x, byte y, byte direction, byte type, boolean visible, net.kyori.adventure.text.@Nullable Component caption) {
+        this.x = x; this.y = y; this.visible = visible; this.caption = caption;
+        setDirection(direction);
+        setRawType(type);
+    }
+    /**
+     * Initialize the map cursor.
+     *
+     * @param x The x coordinate, from -128 to 127.
+     * @param y The y coordinate, from -128 to 127.
+     * @param direction The facing of the cursor, from 0 to 15.
+     * @param type The type (color/style) of the map cursor.
+     * @param visible Whether the cursor is visible by default.
+     * @param caption cursor caption
+     */
+    public MapCursor(byte x, byte y, byte direction, @NotNull Type type, boolean visible, net.kyori.adventure.text.@Nullable Component caption) {
+        this.x = x; this.y = y; this.visible = visible; this.caption = caption;
+        setDirection(direction);
+        setType(type);
+    }
+    // Paper end
 
     /**
      * Initialize the map cursor.
@@ -77,7 +111,7 @@ public final class MapCursor {
         setDirection(direction);
         setType(type);
         this.visible = visible;
-        this.caption = caption;
+        this.caption = caption == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(caption); // Paper
     }
 
     /**
@@ -200,23 +234,45 @@ public final class MapCursor {
         this.visible = visible;
     }
 
+    // Paper start
+    /**
+     * Gets the caption on this cursor.
+     *
+     * @return caption
+     */
+    public net.kyori.adventure.text.@Nullable Component caption() {
+        return this.caption;
+    }
+    /**
+     * Sets the caption on this cursor.
+     *
+     * @param caption new caption
+     */
+    public void caption(net.kyori.adventure.text.@Nullable Component caption) {
+        this.caption = caption;
+    }
+    // Paper end
     /**
      * Gets the caption on this cursor.
      *
      * @return caption
+     * @deprecated in favour of {@link #caption()}
      */
     @Nullable
+    @Deprecated // Paper
     public String getCaption() {
-        return caption;
+        return this.caption == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.caption); // Paper
     }
 
     /**
      * Sets the caption on this cursor.
      *
      * @param caption new caption
+     * @deprecated in favour of {@link #caption(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     public void setCaption(@Nullable String caption) {
-        this.caption = caption;
+        this.caption = caption == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(caption); // Paper
     }
 
     /**
diff --git a/src/main/java/org/bukkit/map/MapCursorCollection.java b/src/main/java/org/bukkit/map/MapCursorCollection.java
index 4dba721aefe4fc6699b3b4bfa7ecb0b19c2a2a1a..6bc28d000f538ecbf249467ff3e87e3f4fea963e 100644
--- a/src/main/java/org/bukkit/map/MapCursorCollection.java
+++ b/src/main/java/org/bukkit/map/MapCursorCollection.java
@@ -117,4 +117,22 @@ public final class MapCursorCollection {
     public MapCursor addCursor(int x, int y, byte direction, byte type, boolean visible, @Nullable String caption) {
         return addCursor(new MapCursor((byte) x, (byte) y, direction, type, visible, caption));
     }
+    // Paper start
+    /**
+     * Add a cursor to the collection.
+     *
+     * @param x The x coordinate, from -128 to 127.
+     * @param y The y coordinate, from -128 to 127.
+     * @param direction The facing of the cursor, from 0 to 15.
+     * @param type The type (color/style) of the map cursor.
+     * @param visible Whether the cursor is visible.
+     * @param caption banner caption
+     * @return The newly added MapCursor.
+     * @deprecated Magic value
+     */
+    @Deprecated
+    public @NotNull MapCursor addCursor(int x, int y, byte direction, byte type, boolean visible, net.kyori.adventure.text.@Nullable Component caption) {
+        return addCursor(new MapCursor((byte) x, (byte) y, direction, type, visible, caption));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/permissions/Permissible.java b/src/main/java/org/bukkit/permissions/Permissible.java
index 228421154913116069c20323afb519bdde2134df..26791db3c267670d5782f1d2b67ff7d5b55b9dac 100644
--- a/src/main/java/org/bukkit/permissions/Permissible.java
+++ b/src/main/java/org/bukkit/permissions/Permissible.java
@@ -126,4 +126,34 @@ public interface Permissible extends ServerOperator {
      */
     @NotNull
     public Set<PermissionAttachmentInfo> getEffectivePermissions();
+
+    // Paper start - add TriState permission checks
+    /**
+     * Checks if this object has a permission set and, if it is set, the value of the permission.
+     *
+     * @param permission the permission to check
+     * @return a tri-state of if the permission is set and, if it is set, it's value
+     */
+    default net.kyori.adventure.util.@NotNull TriState permissionValue(final @NotNull Permission permission) {
+        if (this.isPermissionSet(permission)) {
+            return net.kyori.adventure.util.TriState.byBoolean(this.hasPermission(permission));
+        } else {
+            return net.kyori.adventure.util.TriState.NOT_SET;
+        }
+    }
+
+    /**
+     * Checks if this object has a permission set and, if it is set, the value of the permission.
+     *
+     * @param permission the permission to check
+     * @return a tri-state of if the permission is set and, if it is set, it's value
+     */
+    default net.kyori.adventure.util.@NotNull TriState permissionValue(final @NotNull String permission) {
+        if (this.isPermissionSet(permission)) {
+            return net.kyori.adventure.util.TriState.byBoolean(this.hasPermission(permission));
+        } else {
+            return net.kyori.adventure.util.TriState.NOT_SET;
+        }
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/plugin/Plugin.java b/src/main/java/org/bukkit/plugin/Plugin.java
index 03ca87a1cbace2459174bb7bb8847bda766e80c5..b37938745f916b5f0111b07b1a1c97527f026e9d 100644
--- a/src/main/java/org/bukkit/plugin/Plugin.java
+++ b/src/main/java/org/bukkit/plugin/Plugin.java
@@ -179,6 +179,13 @@ public interface Plugin extends TabExecutor {
     @NotNull
     public Logger getLogger();
 
+    // Paper start - Adventure component logger
+    @NotNull
+    default net.kyori.adventure.text.logger.slf4j.ComponentLogger getComponentLogger() {
+        return net.kyori.adventure.text.logger.slf4j.ComponentLogger.logger(getLogger().getName());
+    }
+    // Paper end
+
     /**
      * Returns the name of the plugin.
      * <p>
diff --git a/src/main/java/org/bukkit/scoreboard/Objective.java b/src/main/java/org/bukkit/scoreboard/Objective.java
index 78fd35e6115072c6bc2ff5a899ffc2edb8f45801..22b1dc5fd4d453161a5ee520072f8e8f955b3a80 100644
--- a/src/main/java/org/bukkit/scoreboard/Objective.java
+++ b/src/main/java/org/bukkit/scoreboard/Objective.java
@@ -20,13 +20,35 @@ public interface Objective {
     @NotNull
     String getName();
 
+    // Paper start - Adventure
+    /**
+     * Gets the display name for this objective
+     *
+     * @return this objective's display name
+     * @throws IllegalStateException if this objective has been unregistered
+     */
+    net.kyori.adventure.text.@NotNull Component displayName();
+    /**
+     * Sets the name displayed to players for this objective.
+     *
+     * @param displayName Display name to set
+     * @throws IllegalStateException if this objective has been unregistered
+     * @throws IllegalArgumentException if displayName is null
+     * @throws IllegalArgumentException if displayName is longer than 128
+     *     characters.
+     */
+    void displayName(net.kyori.adventure.text.@Nullable Component displayName);
+    // Paper end - Adventure
+
     /**
      * Gets the name displayed to players for this objective
      *
      * @return this objective's display name
      * @throws IllegalStateException if this objective has been unregistered
+     * @deprecated in favour of {@link #displayName()}
      */
     @NotNull
+    @Deprecated // Paper
     String getDisplayName();
 
     /**
@@ -34,7 +56,9 @@ public interface Objective {
      *
      * @param displayName Display name to set
      * @throws IllegalStateException if this objective has been unregistered
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setDisplayName(@NotNull String displayName);
 
     /**
diff --git a/src/main/java/org/bukkit/scoreboard/Scoreboard.java b/src/main/java/org/bukkit/scoreboard/Scoreboard.java
index 083bb2c92a2c557e10b705b773ced97401586c3c..d5723e977d9a25701a4f387f1b26d2414e0fffb8 100644
--- a/src/main/java/org/bukkit/scoreboard/Scoreboard.java
+++ b/src/main/java/org/bukkit/scoreboard/Scoreboard.java
@@ -26,6 +26,71 @@ public interface Scoreboard {
     @NotNull
     Objective registerNewObjective(@NotNull String name, @NotNull String criteria);
 
+    // Paper start - Adventure
+    /**
+     * Registers an Objective on this Scoreboard
+     *
+     * @param name Name of the Objective
+     * @param criteria Criteria for the Objective
+     * @param displayName display name for the Objective.
+     * @return The registered Objective
+     * @throws IllegalArgumentException if name is longer than 32767
+     *     characters.
+     * @throws IllegalArgumentException if an objective by that name already
+     *     exists
+     * @deprecated use {@link #registerNewObjective(String, Criteria, net.kyori.adventure.text.Component)}
+     */
+    @NotNull
+    @Deprecated
+    Objective registerNewObjective(@NotNull String name, @NotNull String criteria, net.kyori.adventure.text.@Nullable Component displayName);
+    /**
+     * Registers an Objective on this Scoreboard
+     *
+     * @param name Name of the Objective
+     * @param criteria Criteria for the Objective
+     * @param displayName Name displayed to players for the Objective.
+     * @param renderType Manner of rendering the Objective
+     * @return The registered Objective
+     * @throws IllegalArgumentException if name is longer than 32767
+     *     characters.
+     * @throws IllegalArgumentException if an objective by that name already
+     *     exists
+     * @deprecated use {@link #registerNewObjective(String, Criteria, net.kyori.adventure.text.Component, RenderType)}
+     */
+    @NotNull
+    @Deprecated
+    Objective registerNewObjective(@NotNull String name, @NotNull String criteria, net.kyori.adventure.text.@Nullable Component displayName, @NotNull RenderType renderType) throws IllegalArgumentException;
+    /**
+     * Registers an Objective on this Scoreboard
+     *
+     * @param name Name of the Objective
+     * @param criteria Criteria for the Objective
+     * @param displayName Name displayed to players for the Objective.
+     * @return The registered Objective
+     * @throws IllegalArgumentException if name is longer than 32767
+     *     characters.
+     * @throws IllegalArgumentException if an objective by that name already
+     *     exists
+     */
+    @NotNull
+    Objective registerNewObjective(@NotNull String name, @NotNull Criteria criteria, net.kyori.adventure.text.@Nullable Component displayName) throws IllegalArgumentException;
+    /**
+     * Registers an Objective on this Scoreboard
+     *
+     * @param name Name of the Objective
+     * @param criteria Criteria for the Objective
+     * @param displayName Name displayed to players for the Objective.
+     * @param renderType Manner of rendering the Objective
+     * @return The registered Objective
+     * @throws IllegalArgumentException if name is longer than 32767
+     *     characters.
+     * @throws IllegalArgumentException if an objective by that name already
+     *     exists
+     */
+    @NotNull
+    Objective registerNewObjective(@NotNull String name, @NotNull Criteria criteria, net.kyori.adventure.text.@Nullable Component displayName, @NotNull RenderType renderType) throws IllegalArgumentException;
+    // Paper end - Adventure
+
     /**
      * Registers an Objective on this Scoreboard
      *
@@ -37,9 +102,10 @@ public interface Scoreboard {
      *     characters.
      * @throws IllegalArgumentException if an objective by that name already
      *     exists
-     * @deprecated use {@link #registerNewObjective(String, Criteria, String)}
+     * @deprecated use {@link #registerNewObjective(String, Criteria, net.kyori.adventure.text.Component)}
      */
     @NotNull
+    @Deprecated // Paper
     Objective registerNewObjective(@NotNull String name, @NotNull String criteria, @NotNull String displayName);
 
     /**
@@ -54,9 +120,10 @@ public interface Scoreboard {
      *     characters.
      * @throws IllegalArgumentException if an objective by that name already
      *     exists
-     * @deprecated use {@link #registerNewObjective(String, Criteria, String, RenderType)}
+     * @deprecated use {@link #registerNewObjective(String, Criteria, net.kyori.adventure.text.Component, RenderType)}
      */
     @NotNull
+    @Deprecated // Paper
     Objective registerNewObjective(@NotNull String name, @NotNull String criteria, @NotNull String displayName, @NotNull RenderType renderType);
 
     /**
@@ -70,8 +137,10 @@ public interface Scoreboard {
      *     characters.
      * @throws IllegalArgumentException if an objective by that name already
      *     exists
+     * @deprecated in favour of {@link #registerNewObjective(String, Criteria, net.kyori.adventure.text.Component)}
      */
     @NotNull
+    @Deprecated // Paper
     Objective registerNewObjective(@NotNull String name, @NotNull Criteria criteria, @NotNull String displayName);
 
     /**
@@ -86,8 +155,10 @@ public interface Scoreboard {
      *     characters.
      * @throws IllegalArgumentException if an objective by that name already
      *     exists
+     * @deprecated in favour of {@link #registerNewObjective(String, Criteria, net.kyori.adventure.text.Component, RenderType)}
      */
     @NotNull
+    @Deprecated // Paper
     Objective registerNewObjective(@NotNull String name, @NotNull Criteria criteria, @NotNull String displayName, @NotNull RenderType renderType);
 
     /**
diff --git a/src/main/java/org/bukkit/scoreboard/Team.java b/src/main/java/org/bukkit/scoreboard/Team.java
index 7b9a7890b25ca4bd95ab81f3181288bf79ed649c..52e8be769d2e9b69e9833bc9a7fe39afd10c5095 100644
--- a/src/main/java/org/bukkit/scoreboard/Team.java
+++ b/src/main/java/org/bukkit/scoreboard/Team.java
@@ -12,7 +12,7 @@ import org.jetbrains.annotations.Nullable;
  * properties. This team is only relevant to the display of the associated
  * {@link #getScoreboard() scoreboard}.
  */
-public interface Team {
+public interface Team extends net.kyori.adventure.audience.ForwardingAudience { // Paper - Make Team extend ForwardingAudience
 
     /**
      * Gets the name of this Team
@@ -23,13 +23,96 @@ public interface Team {
     @NotNull
     String getName();
 
+    // Paper start - Adventure
+    /**
+     * Gets the display name for this team
+     *
+     * @return Team display name
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    net.kyori.adventure.text.@NotNull Component displayName();
+
+    /**
+     * Sets the name displayed to entries for this team
+     *
+     * @param displayName New display name
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    void displayName(net.kyori.adventure.text.@Nullable Component displayName);
+
+    /**
+     * Gets the prefix prepended to the display of entries on this team.
+     *
+     * @return Team prefix
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    net.kyori.adventure.text.@NotNull Component prefix();
+
+    /**
+     * Sets the prefix prepended to the display of entries on this team.
+     *
+     * @param prefix New prefix
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    void prefix(net.kyori.adventure.text.@Nullable Component prefix);
+
+    /**
+     * Gets the suffix appended to the display of entries on this team.
+     *
+     * @return the team's current suffix
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    net.kyori.adventure.text.@NotNull Component suffix();
+
+    /**
+     * Sets the suffix appended to the display of entries on this team.
+     *
+     * @param suffix the new suffix for this team.
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    void suffix(net.kyori.adventure.text.@Nullable Component suffix);
+
+    /**
+     * Checks if the team has a color specified
+     *
+     * @return true if it has a <b>color</b>
+     * @throws IllegalStateException if this team has been unregistered
+     */
+    boolean hasColor();
+
+    /**
+     * Gets the color of the team.
+     * <br>
+     * This only sets the team outline, other occurrences of colors such as in
+     * names are handled by prefixes / suffixes.
+     *
+     * @return team color
+     * @throws IllegalStateException if this team has been unregistered
+     * @throws IllegalStateException if the team doesn't have a color
+     * @see #hasColor()
+     */
+    net.kyori.adventure.text.format.@NotNull TextColor color();
+
+    /**
+     * Sets the color of the team.
+     * <br>
+     * This only sets the team outline, other occurrences of colors such as in
+     * names are handled by prefixes / suffixes.
+     *
+     * @param color new color, null for no color
+     */
+    void color(net.kyori.adventure.text.format.@Nullable NamedTextColor color);
+    // Paper end - Adventure
+
     /**
      * Gets the name displayed to entries for this team
      *
      * @return Team display name
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #displayName()}
      */
     @NotNull
+    @Deprecated // Paper
     String getDisplayName();
 
     /**
@@ -37,7 +120,9 @@ public interface Team {
      *
      * @param displayName New display name
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #displayName(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setDisplayName(@NotNull String displayName);
 
     /**
@@ -45,8 +130,10 @@ public interface Team {
      *
      * @return Team prefix
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #prefix()}
      */
     @NotNull
+    @Deprecated // Paper
     String getPrefix();
 
     /**
@@ -54,7 +141,9 @@ public interface Team {
      *
      * @param prefix New prefix
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #prefix(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setPrefix(@NotNull String prefix);
 
     /**
@@ -62,8 +151,10 @@ public interface Team {
      *
      * @return the team's current suffix
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #suffix()}
      */
     @NotNull
+    @Deprecated // Paper
     String getSuffix();
 
     /**
@@ -71,7 +162,9 @@ public interface Team {
      *
      * @param suffix the new suffix for this team.
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #suffix(net.kyori.adventure.text.Component)}
      */
+    @Deprecated // Paper
     void setSuffix(@NotNull String suffix);
 
     /**
@@ -82,8 +175,10 @@ public interface Team {
      *
      * @return team color, defaults to {@link ChatColor#RESET}
      * @throws IllegalStateException if this team has been unregistered
+     * @deprecated in favour of {@link #color()}
      */
     @NotNull
+    @Deprecated // Paper
     ChatColor getColor();
 
     /**
@@ -94,7 +189,9 @@ public interface Team {
      *
      * @param color new color, must be non-null. Use {@link ChatColor#RESET} for
      * no color
+     * @deprecated in favour of {@link #color(net.kyori.adventure.text.format.NamedTextColor)}
      */
+    @Deprecated // Paper
     void setColor(@NotNull ChatColor color);
 
     /**
diff --git a/src/test/java/io/papermc/paper/adventure/KeyTest.java b/src/test/java/io/papermc/paper/adventure/KeyTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..7ede17d60358e0e3a04f3166ea9657e5239e0d8f
--- /dev/null
+++ b/src/test/java/io/papermc/paper/adventure/KeyTest.java
@@ -0,0 +1,31 @@
+package io.papermc.paper.adventure;
+
+import java.util.HashSet;
+import java.util.Set;
+import net.kyori.adventure.key.Key;
+import org.bukkit.NamespacedKey;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class KeyTest {
+
+    @Test
+    public void equalsTest() {
+        Key key = new NamespacedKey("test", "key");
+        Key key1 = Key.key("test", "key");
+        assertEquals(key, key1);
+        assertEquals(key1, key);
+    }
+
+    @Test
+    public void setTest() {
+        Key key = new NamespacedKey("test", "key");
+        Key key1 = Key.key("test", "key");
+        Set<Key> set = new HashSet<>(Set.of(key));
+        Set<Key> set1 = new HashSet<>(Set.of(key1));
+        assertTrue(set.contains(key1));
+        assertTrue(set1.contains(key));
+    }
+}