[MOM] Implement Cut Short

Mage.Sets/src/mage/cards/c/CutShort.java

@@ -0,0 +1,100 @@
+package mage.cards.c;
+
+import mage.MageObjectReference;
+import mage.abilities.effects.common.DestroyTargetEffect;
+import mage.abilities.keyword.ConvokeAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.WatcherScope;
+import mage.filter.FilterPermanent;
+import mage.filter.predicate.Predicate;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.target.TargetPermanent;
+import mage.watchers.Watcher;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class CutShort extends CardImpl {
+
+    private static final FilterPermanent filter
+            = new FilterPermanent("planeswalker that was activated this turn or tapped creature");
+
+    static {
+        filter.add(CutShortPredicate.instance);
+    }
+
+    public CutShort(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{2}{W}");
+
+        // Convoke
+        this.addAbility(new ConvokeAbility());
+
+        // Destroy target planeswalker that was activated this turn or tapped creature.
+        this.getSpellAbility().addEffect(new DestroyTargetEffect());
+        this.getSpellAbility().addTarget(new TargetPermanent(filter));
+        this.getSpellAbility().addWatcher(new CutShortWatcher());
+    }
+
+    private CutShort(final CutShort card) {
+        super(card);
+    }
+
+    @Override
+    public CutShort copy() {
+        return new CutShort(this);
+    }
+}
+
+enum CutShortPredicate implements Predicate<Permanent> {
+    instance;
+
+    @Override
+    public boolean apply(Permanent input, Game game) {
+        return input.isCreature(game)
+                && input.isTapped()
+                || input.isPlaneswalker(game)
+                && CutShortWatcher.checkPermanent(input, game);
+    }
+}
+
+class CutShortWatcher extends Watcher {
+
+    private final Set<MageObjectReference> set = new HashSet<>();
+
+    CutShortWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.ACTIVATED_ABILITY) {
+            return;
+        }
+        Permanent permanent = game.getPermanent(event.getSourceId());
+        if (permanent != null) {
+            set.add(new MageObjectReference(permanent, game));
+        }
+    }
+
+    @Override
+    public void reset() {
+        super.reset();
+        set.clear();
+    }
+
+    static boolean checkPermanent(Permanent permanent, Game game) {
+        return game
+                .getState()
+                .getWatcher(CutShortWatcher.class)
+                .set
+                .contains(new MageObjectReference(permanent, game));
+    }
+}

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

@@ -68,6 +68,7 @@ public final class MarchOfTheMachine extends ExpansionSet {
         cards.add(new SetCardInfo("Cosmic Hunger", 182, Rarity.COMMON, mage.cards.c.CosmicHunger.class));
         cards.add(new SetCardInfo("Cragsmasher Yeti", 333, Rarity.COMMON, mage.cards.c.CragsmasherYeti.class));
         cards.add(new SetCardInfo("Crystal Carapace", 183, Rarity.COMMON, mage.cards.c.CrystalCarapace.class));
+        cards.add(new SetCardInfo("Cut Short", 10, Rarity.COMMON, mage.cards.c.CutShort.class));
         cards.add(new SetCardInfo("Deadly Derision", 99, Rarity.COMMON, mage.cards.d.DeadlyDerision.class));
         cards.add(new SetCardInfo("Deeproot Wayfinder", 184, Rarity.RARE, mage.cards.d.DeeprootWayfinder.class));
         cards.add(new SetCardInfo("Dismal Backwater", 269, Rarity.COMMON, mage.cards.d.DismalBackwater.class));