diff --git a/src/main/java/net/Indyuce/mmocore/MMOCore.java b/src/main/java/net/Indyuce/mmocore/MMOCore.java
index 2e07cc61..d867ab2a 100644
--- a/src/main/java/net/Indyuce/mmocore/MMOCore.java
+++ b/src/main/java/net/Indyuce/mmocore/MMOCore.java
@@ -13,6 +13,7 @@ import org.bukkit.scheduler.BukkitRunnable;
 import com.codingforcookies.armorequip.ArmorListener;
 
 import net.Indyuce.mmocore.api.ConfigFile;
+import net.Indyuce.mmocore.api.debug.DebugMode;
 import net.Indyuce.mmocore.api.player.PlayerData;
 import net.Indyuce.mmocore.api.player.profess.resource.PlayerResource;
 import net.Indyuce.mmocore.api.player.stats.StatType;
@@ -232,7 +233,7 @@ public class MMOCore extends JavaPlugin {
 							data.giveMana(data.calculateRegen(PlayerResource.MANA));
 
 						if (data.canRegen(PlayerResource.STAMINA))
-							data.giveMana(data.calculateRegen(PlayerResource.STAMINA));
+							data.giveStamina(data.calculateRegen(PlayerResource.STAMINA));
 					}
 			}
 		}.runTaskTimerAsynchronously(MMOCore.plugin, 100, 20);
@@ -240,6 +241,12 @@ public class MMOCore extends JavaPlugin {
 		saveDefaultConfig();
 		reloadPlugin();
 
+		/*
+		 * enable debug mode for extra debug tools.
+		 */
+		if (getConfig().getBoolean("debug"))
+			new DebugMode();
+
 		Bukkit.getPluginManager().registerEvents(new PlayerAttackEventListener(), this);
 
 		Bukkit.getPluginManager().registerEvents(new DamageManager(), this);
diff --git a/src/main/java/net/Indyuce/mmocore/api/debug/ActionBarRunnable.java b/src/main/java/net/Indyuce/mmocore/api/debug/ActionBarRunnable.java
new file mode 100644
index 00000000..38770812
--- /dev/null
+++ b/src/main/java/net/Indyuce/mmocore/api/debug/ActionBarRunnable.java
@@ -0,0 +1,32 @@
+package net.Indyuce.mmocore.api.debug;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.scheduler.BukkitRunnable;
+
+import net.Indyuce.mmocore.MMOCore;
+import net.md_5.bungee.api.ChatMessageType;
+import net.md_5.bungee.api.chat.TextComponent;
+
+public class ActionBarRunnable extends BukkitRunnable {
+
+	/*
+	 * how to enable it: set 'debug' to true in the config and use the
+	 * 'debug-action-bar' string parameter. hot changes, only need /mmocore
+	 * reload.
+	 */
+
+	@Override
+	public void run() {
+		Bukkit.getOnlinePlayers().forEach(player -> sendActionBar(player));
+	}
+
+	private void sendActionBar(Player player) {
+		player.spigot().sendMessage(ChatMessageType.ACTION_BAR, TextComponent.fromLegacyText(MMOCore.plugin.placeholderParser.parse(player, getMessage())));
+	}
+
+	private String getMessage() {
+		String str = MMOCore.plugin.getConfig().getString("debug-action-bar.format");
+		return str == null ? "" : str;
+	}
+}
diff --git a/src/main/java/net/Indyuce/mmocore/api/debug/DebugMode.java b/src/main/java/net/Indyuce/mmocore/api/debug/DebugMode.java
new file mode 100644
index 00000000..74be61d7
--- /dev/null
+++ b/src/main/java/net/Indyuce/mmocore/api/debug/DebugMode.java
@@ -0,0 +1,10 @@
+package net.Indyuce.mmocore.api.debug;
+
+import net.Indyuce.mmocore.MMOCore;
+
+public class DebugMode {
+	public DebugMode() {
+		if (MMOCore.plugin.getConfig().getBoolean("debug-action-bar.enabled"))
+			new ActionBarRunnable().runTaskTimer(MMOCore.plugin, 0, 10);
+	}
+}