diff --git a/Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java b/Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java
index 0bd8e2fdc..d60bbe387 100644
--- a/Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java
+++ b/Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java
@@ -837,7 +837,8 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
                         case "HOPPER_MINECART":
                         case "MINECART_MOB_SPAWNER":
                         case "SPAWNER_MINECART":
-                        case "ENDER_CRYSTAL":
+                        case "END_CRYSTAL":
+                        case "ENDER_CRYSTAL": // Backwards compatibility for 1.20.4
                         case "MINECART_TNT":
                         case "TNT_MINECART":
                         case "CHEST_BOAT":
@@ -955,6 +956,8 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
                         case "ENDERMITE":
                         case "ENDER_DRAGON":
                         case "GHAST":
+                        case "HAPPY_GHAST": // 1.21.6+
+                        case "GHASTLING": // 1.21.6+
                         case "GIANT":
                         case "GUARDIAN":
                         case "HORSE":
diff --git a/Bukkit/src/main/java/com/plotsquared/bukkit/entity/ReplicatingEntityWrapper.java b/Bukkit/src/main/java/com/plotsquared/bukkit/entity/ReplicatingEntityWrapper.java
index 58779680f..cc8a94592 100644
--- a/Bukkit/src/main/java/com/plotsquared/bukkit/entity/ReplicatingEntityWrapper.java
+++ b/Bukkit/src/main/java/com/plotsquared/bukkit/entity/ReplicatingEntityWrapper.java
@@ -115,7 +115,7 @@ public final class ReplicatingEntityWrapper extends EntityWrapper {
                 this.dataByte = getOrdinal(Boat.Type.values(), boat.getBoatType());
                 storeInventory(boat);
             }
-            case "ARROW", "EGG", "ENDER_CRYSTAL", "ENDER_PEARL", "ENDER_SIGNAL", "EXPERIENCE_ORB", "FALLING_BLOCK", "FIREBALL",
+            case "ARROW", "EGG", "END_CRYSTAL", "ENDER_CRYSTAL", "ENDER_PEARL", "ENDER_SIGNAL", "EXPERIENCE_ORB", "FALLING_BLOCK", "FIREBALL",
                     "FIREWORK", "FISHING_HOOK", "LEASH_HITCH", "LIGHTNING", "MINECART", "MINECART_COMMAND", "MINECART_MOB_SPAWNER",
                     "MINECART_TNT", "PLAYER", "PRIMED_TNT", "SLIME", "SMALL_FIREBALL", "SNOWBALL", "MINECART_FURNACE", "SPLASH_POTION",
                     "THROWN_EXP_BOTTLE", "WITHER_SKULL", "UNKNOWN", "SPECTRAL_ARROW", "SHULKER_BULLET", "DRAGON_FIREBALL", "AREA_EFFECT_CLOUD",
@@ -272,7 +272,7 @@ public final class ReplicatingEntityWrapper extends EntityWrapper {
                 this.dataByte = (byte) entity1.getPhase().ordinal();
                 return;
             }
-            case "SKELETON", "WITHER_SKELETON", "GUARDIAN", "ELDER_GUARDIAN", "GHAST", "MAGMA_CUBE", "SQUID", "PIG_ZOMBIE", "HOGLIN",
+            case "SKELETON", "WITHER_SKELETON", "GUARDIAN", "ELDER_GUARDIAN", "GHAST", "HAPPY_GHAST", "GHASTLING", "MAGMA_CUBE", "SQUID", "PIG_ZOMBIE", "HOGLIN",
                     "ZOMBIFIED_PIGLIN", "PIGLIN", "PIGLIN_BRUTE", "ZOMBIE", "WITHER", "WITCH", "SPIDER", "CAVE_SPIDER", "SILVERFISH",
                     "GIANT", "ENDERMAN", "CREEPER", "BLAZE", "SHULKER", "SNOWMAN", "SNOW_GOLEM" -> {
                 storeLiving((LivingEntity) entity);
@@ -511,7 +511,7 @@ public final class ReplicatingEntityWrapper extends EntityWrapper {
                 ((Slime) entity).setSize(this.dataByte);
                 return entity;
             } */
-            case "ARROW", "EGG", "ENDER_CRYSTAL", "ENDER_PEARL", "ENDER_SIGNAL", "DROPPED_ITEM", "EXPERIENCE_ORB", "FALLING_BLOCK",
+            case "ARROW", "EGG", "END_CRYSTAL", "ENDER_CRYSTAL", "ENDER_PEARL", "ENDER_SIGNAL", "DROPPED_ITEM", "EXPERIENCE_ORB", "FALLING_BLOCK",
                     "FIREBALL", "FIREWORK", "FISHING_HOOK", "LEASH_HITCH", "LIGHTNING", "MINECART", "MINECART_COMMAND",
                     "MINECART_MOB_SPAWNER", "MINECART_TNT", "PLAYER", "PRIMED_TNT", "SMALL_FIREBALL", "SNOWBALL",
                     "SPLASH_POTION", "THROWN_EXP_BOTTLE", "SPECTRAL_ARROW", "SHULKER_BULLET", "AREA_EFFECT_CLOUD",
@@ -676,7 +676,7 @@ public final class ReplicatingEntityWrapper extends EntityWrapper {
                 restoreLiving((LivingEntity) entity);
                 return entity;
             }
-            case "ENDERMITE", "GHAST", "MAGMA_CUBE", "SQUID", "PIG_ZOMBIE", "HOGLIN", "PIGLIN", "ZOMBIFIED_PIGLIN", "PIGLIN_BRUTE", "ZOMBIE", "WITHER", "WITCH", "SPIDER", "CAVE_SPIDER", "SILVERFISH", "GIANT", "ENDERMAN", "CREEPER", "BLAZE", "SNOWMAN", "SHULKER", "GUARDIAN", "ELDER_GUARDIAN", "SKELETON", "WITHER_SKELETON" -> {
+            case "ENDERMITE", "GHAST", "HAPPY_GHAST", "GHASTLING", "MAGMA_CUBE", "SQUID", "PIG_ZOMBIE", "HOGLIN", "PIGLIN", "ZOMBIFIED_PIGLIN", "PIGLIN_BRUTE", "ZOMBIE", "WITHER", "WITCH", "SPIDER", "CAVE_SPIDER", "SILVERFISH", "GIANT", "ENDERMAN", "CREEPER", "BLAZE", "SNOWMAN", "SHULKER", "GUARDIAN", "ELDER_GUARDIAN", "SKELETON", "WITHER_SKELETON" -> {
                 restoreLiving((LivingEntity) entity);
                 return entity;
             }
diff --git a/Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEventListener.java b/Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEventListener.java
index daa7016b4..6abea3958 100644
--- a/Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEventListener.java
+++ b/Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEventListener.java
@@ -79,6 +79,7 @@ import com.plotsquared.core.util.task.TaskManager;
 import com.plotsquared.core.util.task.TaskTime;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
+import com.sk89q.worldedit.util.Enums;
 import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.block.BlockTypes;
 import io.papermc.lib.PaperLib;
@@ -159,6 +160,7 @@ import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
 import java.util.UUID;
@@ -183,6 +185,15 @@ public class PlayerEventListener implements Listener {
             Material.WRITABLE_BOOK,
             Material.WRITTEN_BOOK
     );
+
+    /**
+     * The correct EntityType for End Crystal, determined once at class loading time.
+     * Tries END_CRYSTAL first (1.21+), falls back to ENDER_CRYSTAL (1.20.4 and older).
+     */
+    private static final EntityType END_CRYSTAL_ENTITY_TYPE = Objects.requireNonNull(
+            Enums.findByValue(EntityType.class, "END_CRYSTAL", "ENDER_CRYSTAL")
+    );
+
     private static final Set<String> DYES;
 
     static {
@@ -1317,8 +1328,8 @@ public class PlayerEventListener implements Listener {
                 // reset the player's hand item if spawning needs to be cancelled.
                 if (type == Material.ARMOR_STAND || type == Material.END_CRYSTAL) {
                     Plot plot = location.getOwnedPlotAbs();
-                    if (BukkitEntityUtil.checkEntity(type == Material.ARMOR_STAND ? EntityType.ARMOR_STAND : EntityType.ENDER_CRYSTAL,
-                            plot)) {
+                    EntityType entityType = type == Material.ARMOR_STAND ? EntityType.ARMOR_STAND : END_CRYSTAL_ENTITY_TYPE;
+                    if (BukkitEntityUtil.checkEntity(entityType, plot)) {
                         event.setCancelled(true);
                         break;
                     }
diff --git a/build.gradle.kts b/build.gradle.kts
index c665682fb..f3727c327 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -204,7 +204,7 @@ tasks.getByName<Jar>("jar") {
     enabled = false
 }
 
-val supportedVersions = listOf("1.19.4", "1.20.6", "1.21.1", "1.21.3", "1.21.4", "1.21.5")
+val supportedVersions = listOf("1.19.4", "1.20.6", "1.21.1", "1.21.3", "1.21.4", "1.21.5", "1.21.6", "1.21.7", "1.21.8")
 tasks {
     register("cacheLatestFaweArtifact") {
         val lastSuccessfulBuildUrl = uri("https://ci.athion.net/job/FastAsyncWorldEdit/lastSuccessfulBuild/api/json").toURL()