From 02bb0f72ddf55d4b72b13fe87b463e09584f847c Mon Sep 17 00:00:00 2001
From: theelk801 <theelk801@gmail.com>
Date: Fri, 5 May 2023 20:11:49 -0400
Subject: [PATCH] [MAT] Implement Death-Rattle Oni

---
 .../src/mage/cards/d/DeathRattleOni.java      | 68 +++++++++++++++++++
 .../sets/MarchOfTheMachineTheAftermath.java   |  1 +
 2 files changed, 69 insertions(+)
 create mode 100644 Mage.Sets/src/mage/cards/d/DeathRattleOni.java

diff --git a/Mage.Sets/src/mage/cards/d/DeathRattleOni.java b/Mage.Sets/src/mage/cards/d/DeathRattleOni.java
new file mode 100644
index 00000000000..88a9ebaaf29
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/d/DeathRattleOni.java
@@ -0,0 +1,68 @@
+package mage.cards.d;
+
+import mage.MageInt;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.MultipliedValue;
+import mage.abilities.dynamicvalue.common.CreaturesDiedThisTurnCount;
+import mage.abilities.effects.common.DestroyAllEffect;
+import mage.abilities.effects.common.cost.SpellCostReductionSourceEffect;
+import mage.abilities.hint.common.CreaturesDiedThisTurnHint;
+import mage.abilities.keyword.FlashAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.constants.Zone;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.mageobject.AnotherPredicate;
+import mage.filter.predicate.permanent.WasDealtDamageThisTurnPredicate;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class DeathRattleOni extends CardImpl {
+
+    private static final DynamicValue xValue = new MultipliedValue(CreaturesDiedThisTurnCount.instance, 2);
+    private static final FilterPermanent filter
+            = new FilterCreaturePermanent("other creatures that were dealt damage this turn");
+
+    static {
+        filter.add(AnotherPredicate.instance);
+        filter.add(WasDealtDamageThisTurnPredicate.instance);
+    }
+
+    public DeathRattleOni(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{6}{B}");
+
+        this.subtype.add(SubType.DEMON);
+        this.subtype.add(SubType.SPIRIT);
+        this.power = new MageInt(5);
+        this.toughness = new MageInt(4);
+
+        // Flash
+        this.addAbility(FlashAbility.getInstance());
+
+        // This spell costs 2 less to cast for each creature that died this turn.
+        this.addAbility(new SimpleStaticAbility(
+                Zone.ALL, new SpellCostReductionSourceEffect(xValue)
+                .setText("this spell costs {2} less to cast for each creature that died this turn")
+        ).addHint(CreaturesDiedThisTurnHint.instance).setRuleAtTheTop(true));
+
+        // When Death-Rattle Oni enters the battlefield, destroy all other creatures that were dealt damage this turn.
+        this.addAbility(new EntersBattlefieldTriggeredAbility(new DestroyAllEffect(filter)));
+    }
+
+    private DeathRattleOni(final DeathRattleOni card) {
+        super(card);
+    }
+
+    @Override
+    public DeathRattleOni copy() {
+        return new DeathRattleOni(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/MarchOfTheMachineTheAftermath.java b/Mage.Sets/src/mage/sets/MarchOfTheMachineTheAftermath.java
index 4e7613f7d06..fa87291424c 100644
--- a/Mage.Sets/src/mage/sets/MarchOfTheMachineTheAftermath.java
+++ b/Mage.Sets/src/mage/sets/MarchOfTheMachineTheAftermath.java
@@ -27,6 +27,7 @@ public final class MarchOfTheMachineTheAftermath extends ExpansionSet {
         cards.add(new SetCardInfo("Campus Renovation", 27, Rarity.UNCOMMON, mage.cards.c.CampusRenovation.class));
         cards.add(new SetCardInfo("Coppercoat Vanguard", 1, Rarity.UNCOMMON, mage.cards.c.CoppercoatVanguard.class));
         cards.add(new SetCardInfo("Cosmic Rebirth", 28, Rarity.UNCOMMON, mage.cards.c.CosmicRebirth.class));
+        cards.add(new SetCardInfo("Death-Rattle Oni", 13, Rarity.UNCOMMON, mage.cards.d.DeathRattleOni.class));
         cards.add(new SetCardInfo("Drannith Ruins", 50, Rarity.RARE, mage.cards.d.DrannithRuins.class));
         cards.add(new SetCardInfo("Feast of the Victorious Dead", 30, Rarity.UNCOMMON, mage.cards.f.FeastOfTheVictoriousDead.class));
         cards.add(new SetCardInfo("Filter Out", 7, Rarity.UNCOMMON, mage.cards.f.FilterOut.class));