diff --git a/Mage.Sets/src/mage/cards/r/RepulsiveMutation.java b/Mage.Sets/src/mage/cards/r/RepulsiveMutation.java
new file mode 100644
index 00000000000..decf8f36f55
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/r/RepulsiveMutation.java
@@ -0,0 +1,47 @@
+package mage.cards.r;
+
+import java.util.UUID;
+
+import mage.abilities.dynamicvalue.common.GreatestPowerAmongControlledCreaturesValue;
+import mage.abilities.dynamicvalue.common.ManacostVariableValue;
+import mage.abilities.effects.common.CounterUnlessPaysEffect;
+import mage.abilities.effects.common.counter.AddCountersTargetEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.counters.CounterType;
+import mage.filter.StaticFilters;
+import mage.target.TargetSpell;
+import mage.target.common.TargetControlledCreaturePermanent;
+import mage.target.targetpointer.SecondTargetPointer;
+
+/**
+ *
+ * @author DominionSpy
+ */
+public final class RepulsiveMutation extends CardImpl {
+
+    public RepulsiveMutation(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{X}{G}{U}");
+
+        // Put X +1/+1 counters on target creature you control.
+        getSpellAbility().addEffect(new AddCountersTargetEffect(
+                CounterType.P1P1.createInstance(), ManacostVariableValue.REGULAR));
+        getSpellAbility().addTarget(new TargetControlledCreaturePermanent());
+
+        // Then counter up to one target spell unless its controller pays mana equal to the greatest power among creatures you control.
+        getSpellAbility().addEffect(new CounterUnlessPaysEffect(GreatestPowerAmongControlledCreaturesValue.instance)
+                .setTargetPointer(new SecondTargetPointer())
+                .setText("Then counter up to one target spell unless its controller pays mana equal to the greatest power among creatures you control."));
+        getSpellAbility().addTarget(new TargetSpell(0, 1, StaticFilters.FILTER_SPELL));
+    }
+
+    private RepulsiveMutation(final RepulsiveMutation card) {
+        super(card);
+    }
+
+    @Override
+    public RepulsiveMutation copy() {
+        return new RepulsiveMutation(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
index c55cbb62918..b823ec7289e 100644
--- a/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
+++ b/Mage.Sets/src/mage/sets/MurdersAtKarlovManor.java
@@ -187,6 +187,7 @@ public final class MurdersAtKarlovManor extends ExpansionSet {
         cards.add(new SetCardInfo("Reckless Detective", 141, Rarity.UNCOMMON, mage.cards.r.RecklessDetective.class));
         cards.add(new SetCardInfo("Red Herring", 142, Rarity.COMMON, mage.cards.r.RedHerring.class));
         cards.add(new SetCardInfo("Repeat Offender", 101, Rarity.COMMON, mage.cards.r.RepeatOffender.class));
+        cards.add(new SetCardInfo("Repulsive Mutation", 227, Rarity.UNCOMMON, mage.cards.r.RepulsiveMutation.class));
         cards.add(new SetCardInfo("Riftburst Hellion", 228, Rarity.COMMON, mage.cards.r.RiftburstHellion.class));
         cards.add(new SetCardInfo("Rope", 173, Rarity.UNCOMMON, mage.cards.r.Rope.class));
         cards.add(new SetCardInfo("Rot Farm Mortipede", 102, Rarity.COMMON, mage.cards.r.RotFarmMortipede.class));