NoMod work.

src/engine/wpakpowers/Behaviours.java

@@ -17,6 +17,8 @@ import engine.wpak.data.ModifierEntry;
 import engine.wpak.data.Power;
 import engine.wpak.data.PowerAction;
 
+import java.util.ArrayList;
+
 public class Behaviours {
 
     public static Object Flag(AbstractCharacter caster, Power power, Integer rank, AbstractWorldObject target,
@@ -78,6 +80,19 @@ public class Behaviours {
                                     PowerAction powerAction, Effect effect, ModifierEntry modifierEntry) {
 
         mbEnums.ModType noMod = mbEnums.ModType.valueOf(modifierEntry.arg1);
+        ArrayList<Effect> removeList = new ArrayList<>();
+
+        // Iterate through effects on target slating to remove
+        // all which match the intended modType
+
+        for (AppliedEffect appliedEffect : target._effects.values())
+            if (appliedEffect.modifiers.containsKey(noMod))
+                removeList.add(appliedEffect.effect);
+
+        for (Effect effectEntry : removeList)
+            target._effects.remove(effectEntry);  // wpakPowerManager.removeEffect() instead?
+
+        // target.updateBonuses?
         return noMod;
     }