Fix incomplete removal due to FCollection

forge-ai/src/main/java/forge/ai/ability/CountersPutOrRemoveAi.java

@@ -27,6 +27,7 @@ import forge.ai.ComputerUtil;
 import forge.ai.ComputerUtilCard;
 import forge.ai.SpellAbilityAi;
 import forge.game.Game;
+import forge.game.ability.AbilityUtils;
 import forge.game.card.Card;
 import forge.game.card.CardCollection;
 import forge.game.card.CardCollectionView;
@@ -68,8 +69,6 @@ public class CountersPutOrRemoveAi extends SpellAbilityAi {
     private boolean doTgt(Player ai, SpellAbility sa, boolean mandatory) {
         final Game game = ai.getGame();
 
-        final int amount = Integer.valueOf(sa.getParam("CounterNum"));
-
         // remove counter with Time might use Exile Zone too
         final TargetRestrictions tgt = sa.getTargetRestrictions();
         // need to targetable
@@ -82,6 +81,8 @@ public class CountersPutOrRemoveAi extends SpellAbilityAi {
         // Filter AI-specific targets if provided
         list = ComputerUtil.filterAITgts(sa, ai, list, false);
 
+        final int amount = AbilityUtils.calculateAmount(sa.getHostCard(), sa.getParamOrDefault("CounterNum", "1"), sa);
+
         if (sa.hasParam("CounterType")) {
             // currently only Jhoira's Timebug
             final CounterType type = CounterType.getType(sa.getParam("CounterType"));

forge-core/src/main/java/forge/util/collect/FCollection.java

@@ -11,6 +11,7 @@ import java.util.List;
 import java.util.ListIterator;
 import java.util.NoSuchElementException;
 import java.util.Set;
+import java.util.function.Predicate;
 
 import org.apache.commons.lang3.ArrayUtils;
 
@@ -270,6 +271,15 @@ public class FCollection<T> implements List<T>, /*Set<T>,*/ FCollectionView<T>,
         return false;
     }
 
+    @Override
+    public boolean removeIf(Predicate<? super T> filter) {
+        if (list.removeIf(filter)) {
+            set.removeIf(filter);
+            return true;
+        }
+        return false;
+    }
+
     /**
      * {@inheritDoc}
      */