[40K] Implement Triarch Stalker (#9707)

Mage.Sets/src/mage/cards/t/TriarchStalker.java

@@ -0,0 +1,106 @@
+package mage.cards.t;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.BeginningOfCombatTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continuous.GainAbilityAllEffect;
+import mage.abilities.keyword.MenaceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.ObjectSourcePlayer;
+import mage.filter.predicate.ObjectSourcePlayerPredicate;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+import mage.target.common.TargetOpponent;
+import mage.util.CardUtil;
+
+import java.util.UUID;
+
+/**
+ * @author PurpleCrowbar
+ */
+public final class TriarchStalker extends CardImpl {
+
+    private static final FilterCreaturePermanent filter
+            = new FilterCreaturePermanent("creatures attacking the last chosen player");
+
+    static {
+        filter.add(TriarchStalkerPredicate.instance);
+    }
+
+    public TriarchStalker(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ARTIFACT, CardType.CREATURE}, "{3}{B}{B}");
+        this.subtype.add(SubType.NECRON);
+        this.power = new MageInt(4);
+        this.toughness = new MageInt(5);
+
+        // Targeting Relay — At the beginning of combat on your turn, choose an opponent.
+        this.addAbility(new BeginningOfCombatTriggeredAbility(
+                new TriarchStalkerEffect(), TargetController.YOU, false
+        ).withFlavorWord("Targeting Relay"));
+
+        // Creatures attacking the last chosen player have menace.
+        this.addAbility(new SimpleStaticAbility(new GainAbilityAllEffect(new MenaceAbility(false), Duration.WhileOnBattlefield, filter)));
+    }
+
+    private TriarchStalker(final TriarchStalker card) {
+        super(card);
+    }
+
+    @Override
+    public TriarchStalker copy() {
+        return new TriarchStalker(this);
+    }
+}
+
+enum TriarchStalkerPredicate implements ObjectSourcePlayerPredicate<Permanent> {
+    instance;
+
+    @Override
+    public boolean apply(ObjectSourcePlayer<Permanent> input, Game game) {
+        UUID playerId = (UUID) game.getState().getValue(input.getSourceId() + "_" + game.getState().getZoneChangeCounter(input.getSourceId()) + "_chosenOpponent");
+        return playerId != null && playerId.equals(game.getCombat().getDefendingPlayerId(input.getObject().getId(), game));
+    }
+}
+
+class TriarchStalkerEffect extends OneShotEffect {
+
+    TriarchStalkerEffect() {
+        super(Outcome.Benefit);
+        staticText = "choose an opponent";
+    }
+
+    private TriarchStalkerEffect(final TriarchStalkerEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public TriarchStalkerEffect copy() {
+        return new TriarchStalkerEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        Permanent permanent = source.getSourcePermanentOrLKI(game);
+        if (player == null || permanent == null) {
+            return false;
+        }
+        TargetOpponent target = new TargetOpponent();
+        target.setNotTarget(true);
+        player.choose(outcome, target, source, game);
+        Player chosenPlayer = game.getPlayer(target.getFirstTarget());
+        if (chosenPlayer == null) {
+            return false;
+        }
+        game.informPlayers(permanent.getName() + ": " + player.getLogName() + " has chosen " + chosenPlayer.getLogName());
+        game.getState().setValue(permanent.getId() + "_" + permanent.getZoneChangeCounter(game) + "_chosenOpponent", chosenPlayer.getId());
+        permanent.addInfo("chosen opponent", CardUtil.addToolTipMarkTags("Chosen player: " + chosenPlayer.getLogName()), game);
+        return true;
+    }
+}

Mage.Sets/src/mage/sets/Warhammer40000.java

@@ -273,6 +273,7 @@ public final class Warhammer40000 extends ExpansionSet {
         cards.add(new SetCardInfo("Tranquil Cove", 303, Rarity.COMMON, mage.cards.t.TranquilCove.class));
         cards.add(new SetCardInfo("Trazyn the Infinite", 65, Rarity.RARE, mage.cards.t.TrazynTheInfinite.class));
         cards.add(new SetCardInfo("Triarch Praetorian", 66, Rarity.UNCOMMON, mage.cards.t.TriarchPraetorian.class));
+        cards.add(new SetCardInfo("Triarch Stalker", 67, Rarity.RARE, mage.cards.t.TriarchStalker.class));
         cards.add(new SetCardInfo("Trygon Prime", 143, Rarity.UNCOMMON, mage.cards.t.TrygonPrime.class));
         cards.add(new SetCardInfo("Tyranid Harridan", 144, Rarity.RARE, mage.cards.t.TyranidHarridan.class));
         cards.add(new SetCardInfo("Tyranid Invasion", 102, Rarity.UNCOMMON, mage.cards.t.TyranidInvasion.class));