Correct UntapTargetCost similarly to UntapSourceCost per 118.11

Mage/src/main/java/mage/abilities/costs/common/UntapTargetCost.java

@@ -4,6 +4,7 @@
 import mage.abilities.costs.Cost;
 import mage.abilities.costs.CostImpl;
 import mage.constants.Outcome;
+import mage.counters.CounterType;
 import mage.game.Game;
 import mage.game.permanent.Permanent;
 import mage.target.TargetPermanent;
@@ -45,7 +46,10 @@ public boolean pay(Ability ability, Game game, Ability source, UUID controllerId
                 return false;
             }
 
-            if (permanent.untap(game)) {
+            // 118.11 - if a stun counter replaces the untap, the cost has still been paid.
+            // Fear of Sleep Paralysis ruling - if the stun counter can't be removed, the untap cost hasn't been paid.
+            int stunCount = permanent.getCounters(game).getCount(CounterType.STUN);
+            if (permanent.untap(game) || (stunCount > 0 && permanent.getCounters(game).getCount(CounterType.STUN) < stunCount)) {
                 untapped.add(targetId);
             }