[DMU] Implemented Impede Momentum (#9383)

Mage.Sets/src/mage/cards/i/ImpedeMomentum.java

@@ -0,0 +1,41 @@
+package mage.cards.i;
+
+import mage.abilities.effects.common.TapTargetEffect;
+import mage.abilities.effects.common.counter.AddCountersTargetEffect;
+import mage.abilities.effects.keyword.ScryEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.counters.CounterType;
+import mage.target.common.TargetCreaturePermanent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class ImpedeMomentum extends CardImpl {
+
+    public ImpedeMomentum(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{1}{U}");
+
+        // Tap target creature and put three stun counters on it.
+        this.getSpellAbility().addEffect(new TapTargetEffect());
+        this.getSpellAbility().addEffect(new AddCountersTargetEffect(
+                CounterType.STUN.createInstance(3)
+        ).setText("and put three stun counters on it"));
+        this.getSpellAbility().addTarget(new TargetCreaturePermanent());
+
+        // Scry 1.
+        this.getSpellAbility().addEffect(new ScryEffect(1).concatBy("<br>"));
+    }
+
+    private ImpedeMomentum(final ImpedeMomentum card) {
+        super(card);
+    }
+
+    @Override
+    public ImpedeMomentum copy() {
+        return new ImpedeMomentum(this);
+    }
+}

Mage.Sets/src/mage/sets/DominariaUnited.java

@@ -32,6 +32,7 @@ public final class DominariaUnited extends ExpansionSet {
         cards.add(new SetCardInfo("Charismatic Vanguard", 10, Rarity.COMMON, mage.cards.c.CharismaticVanguard.class));
         cards.add(new SetCardInfo("Evolved Sleeper", 93, Rarity.RARE, mage.cards.e.EvolvedSleeper.class));
         cards.add(new SetCardInfo("Forest", 281, Rarity.LAND, mage.cards.basiclands.Forest.class, FULL_ART_BFZ_VARIOUS));
+        cards.add(new SetCardInfo("Impede Momentum", 54, Rarity.COMMON, mage.cards.i.ImpedeMomentum.class));
         cards.add(new SetCardInfo("Island", 278, Rarity.LAND, mage.cards.basiclands.Island.class, FULL_ART_BFZ_VARIOUS));
         cards.add(new SetCardInfo("Jaya, Fiery Negotiator", 133, Rarity.MYTHIC, mage.cards.j.JayaFieryNegotiator.class));
         cards.add(new SetCardInfo("Karplusan Forest", 250, Rarity.RARE, mage.cards.k.KarplusanForest.class));

Mage/src/main/java/mage/abilities/effects/keyword/StunCounterEffect.java

@@ -0,0 +1,52 @@
+package mage.abilities.effects.keyword;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.counters.CounterType;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+
+/**
+ * @author TheElk801
+ */
+public class StunCounterEffect extends ReplacementEffectImpl {
+
+    public StunCounterEffect() {
+        super(Duration.Custom, Outcome.Tap);
+        this.staticText = "If a permanent with a stun counter would become untapped, remove one from it instead.";
+    }
+
+    private StunCounterEffect(final StunCounterEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public StunCounterEffect copy() {
+        return new StunCounterEffect(this);
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        Permanent permanent = game.getPermanent(event.getTargetId());
+        if (permanent == null || permanent.getCounters(game).getCount(CounterType.STUN) < 1) {
+            return false;
+        }
+        permanent.removeCounters(CounterType.STUN.getName(), 1, source, game);
+        game.informPlayers("Removed a stun counter from " + permanent.getLogName());
+        return true;
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.UNTAP;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        Permanent permanent = game.getPermanent(event.getTargetId());
+        return permanent != null && permanent.getCounters(game).getCount(CounterType.STUN) > 0;
+    }
+}

Mage/src/main/java/mage/counters/CounterType.java

@@ -171,6 +171,7 @@ public enum CounterType {
     STORAGE("storage"),
     STRIFE("strife"),
     STUDY("study"),
+    STUN("stun"),
     SUSPECT("suspect"),
     TASK("task"),
     THEFT("theft"),

Mage/src/main/java/mage/game/GameImpl.java

@@ -15,6 +15,7 @@ import mage.abilities.effects.PreventionEffectData;
 import mage.abilities.effects.common.CopyEffect;
 import mage.abilities.effects.common.InfoEffect;
 import mage.abilities.effects.keyword.ShieldCounterEffect;
+import mage.abilities.effects.keyword.StunCounterEffect;
 import mage.abilities.keyword.*;
 import mage.abilities.mana.DelayedTriggeredManaAbility;
 import mage.abilities.mana.TriggeredManaAbility;
@@ -1123,6 +1124,9 @@ public abstract class GameImpl implements Game {
         // Apply shield counter mechanic from SNC
         state.addAbility(new SimpleStaticAbility(Zone.ALL, new ShieldCounterEffect()), null);
 
+        // Apply stun counter mechanic
+        state.addAbility(new SimpleStaticAbility(Zone.ALL, new StunCounterEffect()), null);
+
         // Handle companions
         Map<Player, Card> playerCompanionMap = new HashMap<>();
         for (Player player : state.getPlayers().values()) {