diff --git a/lib/MMOLib.jar b/lib/MMOLib.jar
index ab582917..32ca38c5 100644
Binary files a/lib/MMOLib.jar and b/lib/MMOLib.jar differ
diff --git a/src/main/java/net/Indyuce/mmocore/MMOCore.java b/src/main/java/net/Indyuce/mmocore/MMOCore.java
index c4e34745..8909bbe3 100644
--- a/src/main/java/net/Indyuce/mmocore/MMOCore.java
+++ b/src/main/java/net/Indyuce/mmocore/MMOCore.java
@@ -352,7 +352,7 @@ public class MMOCore extends JavaPlugin {
 			new BukkitRunnable() {
 				public void run() {
 					for (PlayerData loaded : PlayerData.getAll())
-						dataProvider.getDataManager().saveData(loaded);
+						if(loaded.isFullyLoaded()) dataProvider.getDataManager().saveData(loaded);
 
 					for (Guild guild : dataProvider.getGuildManager().getAll())
 						dataProvider.getGuildManager().save(guild);
@@ -363,6 +363,7 @@ public class MMOCore extends JavaPlugin {
 
 	public void onDisable() {
 		for (PlayerData data : PlayerData.getAll()) {
+			if(!data.isFullyLoaded()) return;
 			data.getQuestData().resetBossBar();
 			dataProvider.getDataManager().saveData(data);
 		}
diff --git a/src/main/java/net/Indyuce/mmocore/api/block/BlockInfo.java b/src/main/java/net/Indyuce/mmocore/api/block/BlockInfo.java
index b15531ea..85fdcca4 100644
--- a/src/main/java/net/Indyuce/mmocore/api/block/BlockInfo.java
+++ b/src/main/java/net/Indyuce/mmocore/api/block/BlockInfo.java
@@ -5,8 +5,12 @@ import java.util.List;
 import java.util.Optional;
 import java.util.logging.Level;
 
+import net.mmogroup.mmolib.UtilityMethods;
+import net.mmogroup.mmolib.api.condition.BlockCondition;
+import net.mmogroup.mmolib.api.condition.MMOCondition;
 import org.apache.commons.lang.Validate;
 import org.bukkit.Location;
+import org.bukkit.block.Block;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.inventory.ItemStack;
@@ -24,6 +28,7 @@ public class BlockInfo {
 	private final boolean vanillaDrops;
 	private final List<Trigger> triggers = new ArrayList<>();
 	private final RegenInfo regen;
+	private final List<BlockCondition> conditions = new ArrayList<>();
 
 	/*
 	 * saved separately because MMOCore needs to display the experience gained,
@@ -56,6 +61,13 @@ public class BlockInfo {
 
 		Optional<Trigger> opt = triggers.stream().filter(trigger -> (trigger instanceof ExperienceTrigger)).findFirst();
 		experience = (ExperienceTrigger) opt.orElse(null);
+
+		if(config.isList("conditions"))
+			for(String key : config.getStringList("conditions")) {
+				MMOCondition condition = UtilityMethods.getCondition(key);
+				if(condition instanceof BlockCondition) conditions.add((BlockCondition) condition);
+			}
+
 	}
 
 	public boolean hasVanillaDrops() {
@@ -110,6 +122,13 @@ public class BlockInfo {
 		return triggers;
 	}
 
+	public boolean checkConditions(Block block) {
+		for(BlockCondition condition : conditions)
+			if(!condition.check(block)) return false;
+
+		return true;
+	}
+
 	public static class RegeneratingBlock {
 		private final BlockData data;
 		private final Location loc;
diff --git a/src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java b/src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java
index 116b1469..9cd325bc 100644
--- a/src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java
+++ b/src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java
@@ -96,6 +96,8 @@ public class PlayerData extends OfflinePlayerData {
 	public boolean nocd;
 	public CombatRunnable combat;
 
+	private boolean fullyLoaded = false;
+
 	public PlayerData(MMOPlayerData mmoData) {
 		super(mmoData.getUniqueId());
 
@@ -581,6 +583,14 @@ public class PlayerData extends OfflinePlayerData {
 		stellium = Math.max(0, Math.min(amount, getStats().getStat(StatType.MAX_STELLIUM)));
 	}
 
+	public boolean isFullyLoaded() {
+		return fullyLoaded;
+	}
+
+	public void setFullyLoaded() {
+		this.fullyLoaded = true;
+	}
+
 	public boolean isCasting() {
 		return skillCasting != null;
 	}
diff --git a/src/main/java/net/Indyuce/mmocore/listener/BlockListener.java b/src/main/java/net/Indyuce/mmocore/listener/BlockListener.java
index dfb76463..3a48d3ea 100644
--- a/src/main/java/net/Indyuce/mmocore/listener/BlockListener.java
+++ b/src/main/java/net/Indyuce/mmocore/listener/BlockListener.java
@@ -51,7 +51,7 @@ public class BlockListener implements Listener {
 		 */
 		BlockInfo info = MMOCore.plugin.mineManager.getInfo(block);
 		boolean temporaryBlock = MMOCore.plugin.mineManager.isTemporaryBlock(block);
-		if (temporaryBlock && info == null) {
+		if ((temporaryBlock && info == null) || !info.checkConditions(block)) {
 			event.setCancelled(true);
 			return;
 		}
diff --git a/src/main/java/net/Indyuce/mmocore/listener/SpellCast.java b/src/main/java/net/Indyuce/mmocore/listener/SpellCast.java
index 5d09e644..537ae3cc 100644
--- a/src/main/java/net/Indyuce/mmocore/listener/SpellCast.java
+++ b/src/main/java/net/Indyuce/mmocore/listener/SpellCast.java
@@ -101,7 +101,7 @@ public class SpellCast implements Listener {
 					? MMOCore.plugin.configManager.sneakingSwapAction
 					: MMOCore.plugin.configManager.normalSwapAction;
 			if(action != ConfigManager.SwapAction.SPELL_CAST || !playerData.isOnline()) return;
-			if (event.getPlayer().equals(playerData.getPlayer()) && !player.isSneaking()) {
+			if (event.getPlayer().equals(playerData.getPlayer())) {
 				MMOCore.plugin.soundManager.play(player, SoundManager.SoundEvent.SPELL_CAST_END);
 				MMOCore.plugin.configManager.getSimpleMessage("casting.no-longer").send(playerData.getPlayer());
 				close();
diff --git a/src/main/java/net/Indyuce/mmocore/manager/data/PlayerDataManager.java b/src/main/java/net/Indyuce/mmocore/manager/data/PlayerDataManager.java
index 6a638b9f..e653e3e1 100644
--- a/src/main/java/net/Indyuce/mmocore/manager/data/PlayerDataManager.java
+++ b/src/main/java/net/Indyuce/mmocore/manager/data/PlayerDataManager.java
@@ -47,8 +47,12 @@ public abstract class PlayerDataManager {
 			 */
 			Bukkit.getScheduler().runTaskAsynchronously(MMOCore.plugin, () -> {
 				PlayerData loaded = PlayerData.get(uuid);
+				if(!loaded.isOnline()) return;
 				loadData(loaded);
-				Bukkit.getScheduler().runTask(MMOCore.plugin, () -> Bukkit.getPluginManager().callEvent(new PlayerDataLoadEvent(loaded)));
+				Bukkit.getScheduler().runTask(MMOCore.plugin, () -> {
+					if(loaded.isOnline())
+						Bukkit.getPluginManager().callEvent(new PlayerDataLoadEvent(loaded));
+				});
 				loaded.getStats().updateStats();
 			});
 		}
diff --git a/src/main/java/net/Indyuce/mmocore/manager/data/mysql/MySQLPlayerDataManager.java b/src/main/java/net/Indyuce/mmocore/manager/data/mysql/MySQLPlayerDataManager.java
index 68c4767d..11de26de 100644
--- a/src/main/java/net/Indyuce/mmocore/manager/data/mysql/MySQLPlayerDataManager.java
+++ b/src/main/java/net/Indyuce/mmocore/manager/data/mysql/MySQLPlayerDataManager.java
@@ -105,6 +105,7 @@ public class MySQLPlayerDataManager extends PlayerDataManager {
 									}
 								}
 							}
+							data.setFullyLoaded();
 						} catch (SQLException e) {
 							e.printStackTrace();
 						}
@@ -249,7 +250,7 @@ public class MySQLPlayerDataManager extends PlayerDataManager {
 
 	@Override
 	public void remove(PlayerData data) {
-		saveData(data);
+		if(data.isFullyLoaded()) saveData(data);
 		remove(data.getUniqueId());
 	}
 }
diff --git a/src/main/java/net/Indyuce/mmocore/manager/data/yaml/YAMLPlayerDataManager.java b/src/main/java/net/Indyuce/mmocore/manager/data/yaml/YAMLPlayerDataManager.java
index 3d95c6c1..cc0e4f4b 100644
--- a/src/main/java/net/Indyuce/mmocore/manager/data/yaml/YAMLPlayerDataManager.java
+++ b/src/main/java/net/Indyuce/mmocore/manager/data/yaml/YAMLPlayerDataManager.java
@@ -67,6 +67,7 @@ public class YAMLPlayerDataManager extends PlayerDataManager {
 				} catch (IllegalArgumentException exception) {
 					MMOCore.log(Level.WARNING, "Could not load class info '" + key + "': " + exception.getMessage());
 				}
+		data.setFullyLoaded();
 	}
 
 	@Override