send help ._.

SpigotCore/SpigotCore_21/build.gradle.kts

@@ -30,4 +30,10 @@ dependencies {
             attribute(TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, 21)
         }
     }
+    compileOnly(libs.nms21) {
+        attributes {
+            // Very Hacky, but it works
+            attribute(TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, 21)
+        }
+    }
 }

SpigotCore/SpigotCore_21/src/de/steamwar/core/TrickyTrialsWrapper21.java

@@ -17,22 +17,19 @@
  *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package de.steamwar.inventory;
+package de.steamwar.core;
 
 import org.bukkit.enchantments.Enchantment;
-import org.bukkit.inventory.ItemFlag;
+import org.bukkit.entity.EntityType;
 
-import java.util.Collection;
-import java.util.EnumSet;
-
-public class SWItem21 implements SWItem.ISWItem {
+public class TrickyTrialsWrapper21 implements TrickyTrialsWrapper {
     @Override
-    public Collection<ItemFlag> getHideFlags() {
-        return EnumSet.allOf(ItemFlag.class);
+    public EntityType getTntEntityType() {
+        return EntityType.TNT;
     }
 
     @Override
-    public Enchantment getDurabilityEnchantment() {
+    public Enchantment getUnbreakingEnchantment() {
         return Enchantment.UNBREAKING;
     }
 }