[MKM] Implement Yarus, Roar of the Old Gods (#11750)

---------

Co-authored-by: Matthew Wilson <matthew_w@vaadin.com>

Mage.Sets/src/mage/cards/y/YarusRoarOfTheOldGods.java

@@ -0,0 +1,118 @@
+package mage.cards.y;
+
+import java.util.UUID;
+import mage.MageInt;
+import mage.MageObjectReference;
+import mage.abilities.Ability;
+import mage.abilities.common.DealCombatDamageControlledTriggeredAbility;
+import mage.abilities.common.DiesCreatureTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.DrawCardSourceControllerEffect;
+import mage.abilities.effects.common.continuous.BecomesFaceDownCreatureEffect;
+import mage.abilities.effects.common.continuous.GainAbilityControlledEffect;
+import mage.abilities.keyword.HasteAbility;
+import mage.cards.Card;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.constants.SubType;
+import mage.constants.SuperType;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.TargetController;
+import mage.constants.Zone;
+import mage.filter.StaticFilters;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.card.FaceDownPredicate;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+
+/**
+ *
+ * @author DominionSpy
+ */
+public final class YarusRoarOfTheOldGods extends CardImpl {
+
+    private static final FilterCreaturePermanent filter =
+            new FilterCreaturePermanent("face-down creature");
+
+    static {
+        filter.add(TargetController.YOU.getControllerPredicate());
+        filter.add(FaceDownPredicate.instance);
+    }
+
+    public YarusRoarOfTheOldGods(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{R}{G}");
+
+        this.supertype.add(SuperType.LEGENDARY);
+        this.subtype.add(SubType.CENTAUR);
+        this.subtype.add(SubType.DRUID);
+        this.power = new MageInt(4);
+        this.toughness = new MageInt(4);
+
+        // Other creatures you control have haste.
+        this.addAbility(new SimpleStaticAbility(new GainAbilityControlledEffect(
+                HasteAbility.getInstance(), Duration.WhileOnBattlefield,
+                StaticFilters.FILTER_PERMANENT_CREATURES, true)));
+        // Whenever one or more face-down creatures you control deal combat damage to a player, draw a card.
+        this.addAbility(new DealCombatDamageControlledTriggeredAbility(
+                new DrawCardSourceControllerEffect(1), filter)
+                .setTriggerPhrase("Whenever one or more face-down creatures you control deal combat damage to a player, "));
+        // Whenever a face-down creature you control dies, return it to the battlefield face down under its owner's control if it's a permanent card, then turn it face up.
+        this.addAbility(new DiesCreatureTriggeredAbility(
+                new YarusRoarOfTheOldGodsEffect(), false, filter, true));
+    }
+
+    private YarusRoarOfTheOldGods(final YarusRoarOfTheOldGods card) {
+        super(card);
+    }
+
+    @Override
+    public YarusRoarOfTheOldGods copy() {
+        return new YarusRoarOfTheOldGods(this);
+    }
+}
+
+class YarusRoarOfTheOldGodsEffect extends OneShotEffect {
+
+    YarusRoarOfTheOldGodsEffect() {
+        super(Outcome.PutCardInPlay);
+        this.staticText = "return it to the battlefield face down under its owner's control " +
+                "if it's a permanent card, then turn it face up";
+    }
+
+    private YarusRoarOfTheOldGodsEffect(final YarusRoarOfTheOldGodsEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public YarusRoarOfTheOldGodsEffect copy() {
+        return new YarusRoarOfTheOldGodsEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player controller = game.getPlayer(source.getControllerId());
+        Card card = game.getCard(getTargetPointer().getFirst(game, source));
+        if (controller == null || card == null || !card.isPermanent(game)) {
+            return false;
+        }
+
+        Ability newSource = source.copy();
+        newSource.setWorksFaceDown(true);
+        MageObjectReference mor = new MageObjectReference(card.getId(),
+                card.getZoneChangeCounter(game) + 1, game);
+        game.addEffect(new BecomesFaceDownCreatureEffect(
+                null, mor, Duration.Custom,
+                BecomesFaceDownCreatureEffect.FaceDownType.MANUAL), newSource);
+        controller.moveCards(card, Zone.BATTLEFIELD, source, game, false, true, true, null);
+
+        Permanent permanent = game.getPermanent(card.getId());
+        if (permanent != null) {
+            permanent.turnFaceUp(source, game, source.getControllerId());
+        }
+        return true;
+    }
+}

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

@@ -236,6 +236,7 @@ public final class MurdersAtKarlovManor extends ExpansionSet {
         cards.add(new SetCardInfo("Wispdrinker Vampire", 243, Rarity.UNCOMMON, mage.cards.w.WispdrinkerVampire.class));
         cards.add(new SetCardInfo("Wojek Investigator", 36, Rarity.RARE, mage.cards.w.WojekInvestigator.class));
         cards.add(new SetCardInfo("Wrench", 37, Rarity.UNCOMMON, mage.cards.w.Wrench.class));
+        cards.add(new SetCardInfo("Yarus, Roar of the Old Gods", 245, Rarity.RARE, mage.cards.y.YarusRoarOfTheOldGods.class));
 
         cards.removeIf(setCardInfo -> unfinished.contains(setCardInfo.getName())); // remove when mechanic is implemented
     }