From a39668512e29178f02cf88aaa4b00d0c524a8e18 Mon Sep 17 00:00:00 2001
From: theelk801 <theelk801@gmail.com>
Date: Mon, 22 Jan 2024 10:47:19 -0500
Subject: [PATCH] [MKM] Implement Treacherous Greed

---
 .../src/mage/cards/t/TreacherousGreed.java    | 104 ++++++++++++++++++
 .../src/mage/sets/MurdersAtKarlovManor.java   |   1 +
 2 files changed, 105 insertions(+)
 create mode 100644 Mage.Sets/src/mage/cards/t/TreacherousGreed.java

diff --git a/Mage.Sets/src/mage/cards/t/TreacherousGreed.java b/Mage.Sets/src/mage/cards/t/TreacherousGreed.java
new file mode 100644
index 00000000000..6960163a970
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/t/TreacherousGreed.java
@@ -0,0 +1,104 @@
+package mage.cards.t;
+
+import mage.MageObjectReference;
+import mage.abilities.costs.common.SacrificeTargetCost;
+import mage.abilities.effects.common.DrawCardSourceControllerEffect;
+import mage.abilities.effects.common.GainLifeEffect;
+import mage.abilities.effects.common.LoseLifeOpponentsEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.WatcherScope;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterControlledCreaturePermanent;
+import mage.filter.predicate.Predicate;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.watchers.Watcher;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class TreacherousGreed extends CardImpl {
+
+    private static final FilterPermanent filter
+            = new FilterControlledCreaturePermanent("a creature that dealt damage this turn");
+
+    static {
+        filter.add(TreacherousGreedPredicate.instance);
+    }
+
+    public TreacherousGreed(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{1}{W}{B}");
+
+        // As an additional cost to cast this spell, sacrifice a creature that dealt damage this turn.
+        this.getSpellAbility().addCost(new SacrificeTargetCost(filter));
+        this.getSpellAbility().addWatcher(new TreacherousGreedWatcher());
+
+        // Draw three cards. Each opponent loses 3 life and you gain 3 life.
+        this.getSpellAbility().addEffect(new DrawCardSourceControllerEffect(3));
+        this.getSpellAbility().addEffect(new LoseLifeOpponentsEffect(3));
+        this.getSpellAbility().addEffect(new GainLifeEffect(3).concatBy("and"));
+    }
+
+    private TreacherousGreed(final TreacherousGreed card) {
+        super(card);
+    }
+
+    @Override
+    public TreacherousGreed copy() {
+        return new TreacherousGreed(this);
+    }
+}
+
+enum TreacherousGreedPredicate implements Predicate<Permanent> {
+    instance;
+
+    @Override
+    public boolean apply(Permanent input, Game game) {
+        return false;
+    }
+}
+
+class TreacherousGreedWatcher extends Watcher {
+
+    private final Set<MageObjectReference> set = new HashSet<>();
+
+    TreacherousGreedWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        switch (event.getType()) {
+            case DAMAGED_PLAYER:
+            case DAMAGED_PERMANENT:
+                break;
+            default:
+                return;
+        }
+        Permanent permanent = game.getPermanent(event.getSourceId());
+        if (permanent != null) {
+            set.add(new MageObjectReference(permanent, game));
+        }
+    }
+
+    @Override
+    public void reset() {
+        set.clear();
+        super.reset();
+    }
+
+    static boolean checkCreature(Permanent permanent, Game game) {
+        return game
+                .getState()
+                .getWatcher(TreacherousGreedWatcher.class)
+                .set
+                .contains(new MageObjectReference(permanent, game));
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
index c2cc280b5c2..893b9b7f2b6 100644
--- a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
+++ b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
@@ -108,6 +108,7 @@ public final class MurdersAtKarlovManor extends ExpansionSet {
         cards.add(new SetCardInfo("They Went This Way", 178, Rarity.COMMON, mage.cards.t.TheyWentThisWay.class));
         cards.add(new SetCardInfo("Thundering Falls", 269, Rarity.RARE, mage.cards.t.ThunderingFalls.class));
         cards.add(new SetCardInfo("Topiary Panther", 179, Rarity.COMMON, mage.cards.t.TopiaryPanther.class));
+        cards.add(new SetCardInfo("Treacherous Greed", 237, Rarity.RARE, mage.cards.t.TreacherousGreed.class));
         cards.add(new SetCardInfo("Trostani, Three Whispers", 238, Rarity.MYTHIC, mage.cards.t.TrostaniThreeWhispers.class));
         cards.add(new SetCardInfo("Undercity Eliminator", 108, Rarity.UNCOMMON, mage.cards.u.UndercityEliminator.class));
         cards.add(new SetCardInfo("Undercity Sewers", 270, Rarity.RARE, mage.cards.u.UndercitySewers.class));