diff --git a/Mage.Sets/src/mage/cards/u/UnstoppableSlasher.java b/Mage.Sets/src/mage/cards/u/UnstoppableSlasher.java
new file mode 100644
index 00000000000..f3b3386bf50
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/u/UnstoppableSlasher.java
@@ -0,0 +1,73 @@
+package mage.cards.u;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.DealsCombatDamageToAPlayerTriggeredAbility;
+import mage.abilities.common.DiesSourceTriggeredAbility;
+import mage.abilities.condition.Condition;
+import mage.abilities.decorator.ConditionalInterveningIfTriggeredAbility;
+import mage.abilities.effects.common.LoseHalfLifeTargetEffect;
+import mage.abilities.effects.common.ReturnSourceFromGraveyardToBattlefieldWithCounterEffect;
+import mage.abilities.keyword.DeathtouchAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.counters.Counter;
+import mage.counters.CounterType;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+
+import java.util.UUID;
+
+/**
+ * @author PurpleCrowbar
+ */
+public final class UnstoppableSlasher extends CardImpl {
+
+    public UnstoppableSlasher(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{B}");
+        this.subtype.add(SubType.ZOMBIE, SubType.ASSASSIN);
+        this.power = new MageInt(2);
+        this.toughness = new MageInt(3);
+
+        // Deathtouch
+        this.addAbility(DeathtouchAbility.getInstance());
+
+        // Whenever Unstoppable Slasher deals combat damage to a player, they lose half their life, rounded up.
+        this.addAbility(new DealsCombatDamageToAPlayerTriggeredAbility(new LoseHalfLifeTargetEffect()
+                .setText("they lose half their life, rounded up"), false, true));
+
+        // When Unstoppable Slasher dies, if it had no counters on it, return it to the battlefield tapped under its owner's control with two stun counters on it.
+        this.addAbility(new ConditionalInterveningIfTriggeredAbility(new DiesSourceTriggeredAbility(new ReturnSourceFromGraveyardToBattlefieldWithCounterEffect(
+                CounterType.STUN.createInstance(2), true, true, false, false
+        ), false), UnstoppableSlasherCondition.instance, "When {this} dies, if it had no counters on it, return it to the battlefield tapped under its owner's control with two stun counters on it"));
+    }
+
+    private UnstoppableSlasher(final UnstoppableSlasher card) {
+        super(card);
+    }
+
+    @Override
+    public UnstoppableSlasher copy() {
+        return new UnstoppableSlasher(this);
+    }
+}
+
+enum UnstoppableSlasherCondition implements Condition {
+    instance;
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent permanent = source.getSourcePermanentOrLKI(game);
+        if (permanent == null) {
+            return false;
+        }
+        return permanent
+                .getCounters(game)
+                .values()
+                .stream()
+                .mapToInt(Counter::getCount)
+                .sum() == 0;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java b/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java
index 60bfc60f548..81fe839e138 100644
--- a/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java
+++ b/Mage.Sets/src/mage/sets/DuskmournHouseOfHorror.java
@@ -226,6 +226,9 @@ public final class DuskmournHouseOfHorror extends ExpansionSet {
         cards.add(new SetCardInfo("Unidentified Hovership", 37, Rarity.RARE, mage.cards.u.UnidentifiedHovership.class));
         cards.add(new SetCardInfo("Unnerving Grasp", 80, Rarity.UNCOMMON, mage.cards.u.UnnervingGrasp.class));
         cards.add(new SetCardInfo("Unsettling Twins", 38, Rarity.COMMON, mage.cards.u.UnsettlingTwins.class));
+        cards.add(new SetCardInfo("Unstoppable Slasher", 119, Rarity.RARE, mage.cards.u.UnstoppableSlasher.class, NON_FULL_USE_VARIOUS));
+        cards.add(new SetCardInfo("Unstoppable Slasher", 294, Rarity.RARE, mage.cards.u.UnstoppableSlasher.class, NON_FULL_USE_VARIOUS));
+        cards.add(new SetCardInfo("Unstoppable Slasher", 312, Rarity.RARE, mage.cards.u.UnstoppableSlasher.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Untimely Malfunction", 161, Rarity.UNCOMMON, mage.cards.u.UntimelyMalfunction.class));
         cards.add(new SetCardInfo("Unwanted Remake", 39, Rarity.UNCOMMON, mage.cards.u.UnwantedRemake.class));
         cards.add(new SetCardInfo("Unwilling Vessel", 81, Rarity.UNCOMMON, mage.cards.u.UnwillingVessel.class));