Implemented Gadrak, the Crown-Scourge

Mage.Sets/src/mage/cards/g/GadrakTheCrownScourge.java

@@ -0,0 +1,126 @@
+package mage.cards.g;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.BeginningOfEndStepTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.condition.Condition;
+import mage.abilities.condition.common.PermanentsOnTheBattlefieldCondition;
+import mage.abilities.decorator.ConditionalRestrictionEffect;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.common.CreateTokenEffect;
+import mage.abilities.effects.common.combat.CantAttackSourceEffect;
+import mage.abilities.keyword.FlyingAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.StaticFilters;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.events.ZoneChangeEvent;
+import mage.game.permanent.PermanentToken;
+import mage.game.permanent.token.TreasureToken;
+import mage.watchers.Watcher;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class GadrakTheCrownScourge extends CardImpl {
+
+    private static final Condition condition = new PermanentsOnTheBattlefieldCondition(
+            StaticFilters.FILTER_PERMANENT_ARTIFACT, ComparisonType.MORE_THAN, 3
+    );
+
+    public GadrakTheCrownScourge(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{R}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.DRAGON);
+        this.power = new MageInt(5);
+        this.toughness = new MageInt(4);
+
+        // Flying
+        this.addAbility(FlyingAbility.getInstance());
+
+        // Gadrak, the Crown-Scourge can't attack unless you control four or more artifacts.
+        this.addAbility(new SimpleStaticAbility(new ConditionalRestrictionEffect(
+                new CantAttackSourceEffect(Duration.WhileOnBattlefield), condition,
+                "{this} can't attack unless you control four or more artifacts"
+        )));
+
+        // At the beginning of your end step, create a Treasure token for each nontoken creature that died this turn.
+        this.addAbility(new BeginningOfEndStepTriggeredAbility(new CreateTokenEffect(
+                new TreasureToken(), GadrakTheCrownScourgeValue.instance
+        ), TargetController.YOU, false), new GadrakTheCrownScourgeWatcher());
+    }
+
+    private GadrakTheCrownScourge(final GadrakTheCrownScourge card) {
+        super(card);
+    }
+
+    @Override
+    public GadrakTheCrownScourge copy() {
+        return new GadrakTheCrownScourge(this);
+    }
+}
+
+enum GadrakTheCrownScourgeValue implements DynamicValue {
+    instance;
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        GadrakTheCrownScourgeWatcher watcher = game.getState().getWatcher(GadrakTheCrownScourgeWatcher.class);
+        return watcher != null ? watcher.getDiedThisTurn() : 0;
+    }
+
+    @Override
+    public GadrakTheCrownScourgeValue copy() {
+        return instance;
+    }
+
+    @Override
+    public String getMessage() {
+        return "nontoken creature that died this turn";
+    }
+
+    @Override
+    public String toString() {
+        return "1";
+    }
+}
+
+class GadrakTheCrownScourgeWatcher extends Watcher {
+
+    private int diedThisTurn = 0;
+
+    GadrakTheCrownScourgeWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.ZONE_CHANGE) {
+            return;
+        }
+        ZoneChangeEvent zEvent = (ZoneChangeEvent) event;
+        if (zEvent.isDiesEvent()
+                && zEvent.getTarget() != null
+                && zEvent.getTarget().isCreature()
+                && !(zEvent.getTarget() instanceof PermanentToken)) {
+            diedThisTurn++;
+        }
+    }
+
+    @Override
+    public void reset() {
+        super.reset();
+        diedThisTurn = 0;
+    }
+
+    int getDiedThisTurn() {
+        return diedThisTurn;
+    }
+}

Mage.Sets/src/mage/sets/CoreSet2021.java

@@ -39,6 +39,7 @@ public final class CoreSet2021 extends ExpansionSet {
         cards.add(new SetCardInfo("Containment Priest", 314, Rarity.RARE, mage.cards.c.ContainmentPriest.class));
         cards.add(new SetCardInfo("Double Vision", 142, Rarity.RARE, mage.cards.d.DoubleVision.class));
         cards.add(new SetCardInfo("Fierce Empath", 181, Rarity.UNCOMMON, mage.cards.f.FierceEmpath.class));
+        cards.add(new SetCardInfo("Gadrak, the Crown-Scourge", 146, Rarity.RARE, mage.cards.g.GadrakTheCrownScourge.class));
         cards.add(new SetCardInfo("Grim Tutor", 103, Rarity.MYTHIC, mage.cards.g.GrimTutor.class));
         cards.add(new SetCardInfo("Island", 310, Rarity.LAND, mage.cards.basiclands.Island.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Jeskai Elder", 53, Rarity.UNCOMMON, mage.cards.j.JeskaiElder.class));