Implemented Yarok's Fenlurker

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

@@ -0,0 +1,101 @@
+package mage.cards.y;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continuous.BoostSourceEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.cards.Cards;
+import mage.cards.CardsImpl;
+import mage.constants.*;
+import mage.filter.StaticFilters;
+import mage.game.Game;
+import mage.players.Player;
+import mage.target.Target;
+import mage.target.common.TargetCardInHand;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class YaroksFenlurker extends CardImpl {
+
+    public YaroksFenlurker(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{B}{B}");
+
+        this.subtype.add(SubType.HORROR);
+        this.power = new MageInt(1);
+        this.toughness = new MageInt(1);
+
+        // When Yarok's Fenlurker enters the battlefield, each opponent exiles a card from their hand.
+        this.addAbility(new EntersBattlefieldTriggeredAbility(new YaroksFenlurkerEffect()));
+
+        // {2}{B}: Yarok's Fenlurker gets +1/+1 until end of turn.
+        this.addAbility(new SimpleActivatedAbility(
+                new BoostSourceEffect(1, 1, Duration.EndOfTurn), new ManaCostsImpl("{2}{B}")
+        ));
+    }
+
+    private YaroksFenlurker(final YaroksFenlurker card) {
+        super(card);
+    }
+
+    @Override
+    public YaroksFenlurker copy() {
+        return new YaroksFenlurker(this);
+    }
+}
+
+class YaroksFenlurkerEffect extends OneShotEffect {
+
+    YaroksFenlurkerEffect() {
+        super(Outcome.Benefit);
+        staticText = "each opponent exiles a card from their hand";
+    }
+
+    private YaroksFenlurkerEffect(final YaroksFenlurkerEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public YaroksFenlurkerEffect copy() {
+        return new YaroksFenlurkerEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Boolean applied = false;
+        Map<UUID, Cards> cardsToExile = new HashMap<>();
+        for (UUID opponentId : game.getOpponents(source.getControllerId())) {
+            Player opponent = game.getPlayer(opponentId);
+            if (opponent == null) {
+                continue;
+            }
+            int numberOfCardsToExile = Math.min(1, opponent.getHand().size());
+            Target target = new TargetCardInHand(numberOfCardsToExile, StaticFilters.FILTER_CARD);
+            target.setRequired(true);
+            if (opponent.chooseTarget(Outcome.Exile, target, source, game)) {
+                Cards cards = new CardsImpl(target.getTargets());
+                cardsToExile.put(opponentId, cards);
+            }
+        }
+        Cards cardsOpponentsChoseToExile = new CardsImpl();
+        for (UUID opponentId : game.getOpponents(source.getControllerId())) {
+            Player opponent = game.getPlayer(opponentId);
+            if (opponent == null) {
+                continue;
+            }
+            cardsOpponentsChoseToExile.addAll(cardsToExile.get(opponentId));
+            opponent.moveCards(cardsOpponentsChoseToExile, Zone.EXILED, source, game);
+            applied = true;
+        }
+        return applied;
+    }
+}

Mage.Sets/src/mage/sets/CoreSet2020.java

@@ -52,5 +52,6 @@ public final class CoreSet2020 extends ExpansionSet {
         cards.add(new SetCardInfo("Silverback Shaman", 195, Rarity.COMMON, mage.cards.s.SilverbackShaman.class));
         cards.add(new SetCardInfo("Thrashing Brontodon", 197, Rarity.UNCOMMON, mage.cards.t.ThrashingBrontodon.class));
         cards.add(new SetCardInfo("Unsummon", 78, Rarity.COMMON, mage.cards.u.Unsummon.class));
+        cards.add(new SetCardInfo("Yarok's Fenlurker", 123, Rarity.UNCOMMON, mage.cards.y.YaroksFenlurker.class));
     }
 }