Both actions use same behaviour

src/engine/mbEnums.java

@@ -1380,8 +1380,8 @@ public class mbEnums {
     }
 
     public enum PowerActionType {
-        ApplyEffect(Actions::ApplyEffect),
-        ApplyEffects(Actions::ApplyEffects),
+        ApplyEffect(Actions::ApplyEffects),  // No difference but the
+        ApplyEffects(Actions::ApplyEffects), // size of the collection
         Block(Actions::Block),
         Charm(Actions::Charm),
         ClaimMine(Actions::ClaimMine),

src/engine/wpakpowers/Actions.java

@@ -9,11 +9,6 @@ import engine.wpak.data.PowerAction;
 
 public class Actions {
 
-    public static void ApplyEffect(AbstractCharacter caster, AbstractWorldObject target, Power power,
-                                   Integer rank, PowerAction powerAction) {
-
-    }
-
     public static void ApplyEffects(AbstractCharacter caster, AbstractWorldObject target, Power power,
                                     Integer rank, PowerAction powerAction) {