diff --git a/Mage/src/main/java/mage/abilities/effects/RequirementEffect.java b/Mage/src/main/java/mage/abilities/effects/RequirementEffect.java
index 89afa2bd491..3830dd0b189 100644
--- a/Mage/src/main/java/mage/abilities/effects/RequirementEffect.java
+++ b/Mage/src/main/java/mage/abilities/effects/RequirementEffect.java
@@ -27,6 +27,7 @@
  */
 package mage.abilities.effects;
 
+import java.util.List;
 import java.util.UUID;
 import mage.abilities.Ability;
 import mage.constants.Duration;
@@ -98,6 +99,10 @@ public abstract class RequirementEffect extends ContinuousEffectImpl {
         return null;
     }
 
+    public List<UUID> mustBlockAllAttackers(Ability source, Game game) {
+        return null;
+    }
+
     /**
      * Player related check The player returned or controlled planeswalker must
      * be attacked with at least one attacker