Wizards Implode: Don't cast spell if no blocks are effected

Plugins/Nautilus.Game.Arcade/src/nautilus/game/arcade/game/games/wizards/spells/SpellImplode.java

@@ -67,6 +67,11 @@ public class SpellImplode extends Spell implements SpellClick
 				}
 			}
 
+			if (effectedBlocks.isEmpty())
+			{
+				return;
+			}
+
 			Collections.shuffle(effectedBlocks);
 
 			new BukkitRunnable()