Implemented Kelsien, the Plague

Mage.Sets/src/mage/cards/k/KelsienThePlague.java

@@ -0,0 +1,179 @@
+package mage.cards.k;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.DelayedTriggeredAbility;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continuous.BoostSourceEffect;
+import mage.abilities.effects.common.counter.AddCountersControllerEffect;
+import mage.abilities.keyword.HasteAbility;
+import mage.abilities.keyword.VigilanceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.counters.CounterType;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.events.ZoneChangeEvent;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+import mage.target.TargetPermanent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class KelsienThePlague extends CardImpl {
+
+    private static final FilterCreaturePermanent filter
+            = new FilterCreaturePermanent("creature you don't control");
+
+    static {
+        filter.add(TargetController.NOT_YOU.getControllerPredicate());
+    }
+
+    public KelsienThePlague(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{R}{W}{B}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.ASSASSIN);
+        this.power = new MageInt(2);
+        this.toughness = new MageInt(2);
+
+        // Vigilance
+        this.addAbility(VigilanceAbility.getInstance());
+
+        // Haste
+        this.addAbility(HasteAbility.getInstance());
+
+        // Kelsien, the Plague gets +1/+1 for each experience counter you have.
+        this.addAbility(new SimpleStaticAbility(new BoostSourceEffect(
+                KelsienThePlagueCount.instance, KelsienThePlagueCount.instance,
+                Duration.WhileOnBattlefield, false
+        )));
+
+        // {T}: Kelsien deals 1 damage to target creature you don't control. When that creature dies this turn, you get an experience counter.
+        Ability ability = new SimpleActivatedAbility(new KelsienThePlagueEffect(), new TapSourceCost());
+        ability.addTarget(new TargetPermanent(filter));
+        this.addAbility(ability);
+    }
+
+    private KelsienThePlague(final KelsienThePlague card) {
+        super(card);
+    }
+
+    @Override
+    public KelsienThePlague copy() {
+        return new KelsienThePlague(this);
+    }
+}
+
+enum KelsienThePlagueCount implements DynamicValue {
+    instance;
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        int amount = 0;
+        Player player = game.getPlayer(sourceAbility.getControllerId());
+        if (player != null) {
+            amount = player.getCounters().getCount(CounterType.EXPERIENCE);
+        }
+        return amount;
+    }
+
+    @Override
+    public KelsienThePlagueCount copy() {
+        return instance;
+    }
+
+    @Override
+    public String toString() {
+        return "1";
+    }
+
+    @Override
+    public String getMessage() {
+        return "experience counter you have";
+    }
+}
+
+class KelsienThePlagueEffect extends OneShotEffect {
+
+    KelsienThePlagueEffect() {
+        super(Outcome.Benefit);
+        staticText = "{this} deals 1 damage to target creature you don't control. " +
+                "When that creature dies this turn, you get an experience counter.";
+    }
+
+    private KelsienThePlagueEffect(final KelsienThePlagueEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public KelsienThePlagueEffect copy() {
+        return new KelsienThePlagueEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent permanent = game.getPermanent(source.getFirstTarget());
+        if (permanent == null) {
+            return false;
+        }
+        permanent.damage(1, source.getSourceId(), game);
+        game.addDelayedTriggeredAbility(new KelsienThePlagueDelayedTriggeredAbility(permanent.getId()), source);
+        return true;
+    }
+}
+
+class KelsienThePlagueDelayedTriggeredAbility extends DelayedTriggeredAbility {
+
+    private final UUID target;
+
+    KelsienThePlagueDelayedTriggeredAbility(UUID target) {
+        super(new AddCountersControllerEffect(
+                CounterType.EXPERIENCE.createInstance(), false
+        ), Duration.EndOfTurn, true);
+        this.target = target;
+    }
+
+    private KelsienThePlagueDelayedTriggeredAbility(KelsienThePlagueDelayedTriggeredAbility ability) {
+        super(ability);
+        this.target = ability.target;
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ZONE_CHANGE;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        if (!event.getTargetId().equals(target)) {
+            return false;
+        }
+        ZoneChangeEvent zEvent = (ZoneChangeEvent) event;
+        if (zEvent.isDiesEvent()) {
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public KelsienThePlagueDelayedTriggeredAbility copy() {
+        return new KelsienThePlagueDelayedTriggeredAbility(this);
+    }
+
+    @Override
+    public String getRule() {
+        return "When that creature dies this turn, you get an experience counter.";
+    }
+}

Mage.Sets/src/mage/sets/Commander2020Edition.java

@@ -169,6 +169,7 @@ public final class Commander2020Edition extends ExpansionSet {
         cards.add(new SetCardInfo("Kalemne's Captain", 92, Rarity.RARE, mage.cards.k.KalemnesCaptain.class));
         cards.add(new SetCardInfo("Karametra, God of Harvests", 218, Rarity.MYTHIC, mage.cards.k.KarametraGodOfHarvests.class));
         cards.add(new SetCardInfo("Kathril, Aspect Warper", 10, Rarity.MYTHIC, mage.cards.k.KathrilAspectWarper.class));
+        cards.add(new SetCardInfo("Kelsien, the Plague", 11, Rarity.MYTHIC, mage.cards.k.KelsienThePlague.class));
         cards.add(new SetCardInfo("Kessig Wolf Run", 284, Rarity.RARE, mage.cards.k.KessigWolfRun.class));
         cards.add(new SetCardInfo("Knight of the White Orchid", 93, Rarity.RARE, mage.cards.k.KnightOfTheWhiteOrchid.class));
         cards.add(new SetCardInfo("Kodama's Reach", 180, Rarity.COMMON, mage.cards.k.KodamasReach.class));