diff --git a/Mage.Sets/src/mage/cards/d/DuelingGrounds.java b/Mage.Sets/src/mage/cards/d/DuelingGrounds.java
index 68403c03a68..3c1e9f2892a 100644
--- a/Mage.Sets/src/mage/cards/d/DuelingGrounds.java
+++ b/Mage.Sets/src/mage/cards/d/DuelingGrounds.java
@@ -55,7 +55,7 @@ class NoMoreThanOneCreatureCanAttackEachTurnEffect extends RestrictionEffect {
 
     @Override
     public boolean applies(Permanent permanent, Ability source, Game game) {
-        return true;
+        return permanent != null && permanent.isCreature(game);
     }
 
     @Override
@@ -83,7 +83,7 @@ class NoMoreThanOneCreatureCanBlockEachTurnEffect extends RestrictionEffect {
 
     @Override
     public boolean applies(Permanent permanent, Ability source, Game game) {
-        return true;
+        return permanent != null && permanent.isCreature(game);
     }
 
     @Override