diff --git a/Mage.Sets/src/mage/cards/c/CallidusAssassin.java b/Mage.Sets/src/mage/cards/c/CallidusAssassin.java
new file mode 100644
index 00000000000..f394b70b584
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/c/CallidusAssassin.java
@@ -0,0 +1,100 @@
+package mage.cards.c;
+
+import mage.MageInt;
+import mage.MageObject;
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldAbility;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.effects.common.CopyPermanentEffect;
+import mage.abilities.effects.common.DestroyTargetEffect;
+import mage.abilities.effects.common.TapSourceEffect;
+import mage.abilities.keyword.FlashAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.filter.FilterPermanent;
+import mage.filter.StaticFilters;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.ObjectSourcePlayer;
+import mage.filter.predicate.ObjectSourcePlayerPredicate;
+import mage.filter.predicate.mageobject.AnotherPredicate;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.target.TargetPermanent;
+import mage.util.CardUtil;
+import mage.util.functions.CopyApplier;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class CallidusAssassin extends CardImpl {
+
+    public CallidusAssassin(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{4}{U}{B}");
+
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.SHAPESHIFTER);
+        this.subtype.add(SubType.ASSASSIN);
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(3);
+
+        // Flash
+        this.addAbility(FlashAbility.getInstance());
+
+        // Polymorphine -- You may have Callidus Assassin enter the battlefield tapped as a copy of any creature on the battlefield, except it has "When this creature enters the battlefield, destroy up to one other target creature with the same name as this creature."
+        Ability ability = new EntersBattlefieldAbility(
+                new TapSourceEffect(true).setText("tapped"), true
+        );
+        ability.addEffect(new CopyPermanentEffect(
+                StaticFilters.FILTER_PERMANENT_CREATURE, new CallidusAssassinApplier()
+        ));
+        this.addAbility(ability.withFlavorWord("Polymorphine"));
+    }
+
+    private CallidusAssassin(final CallidusAssassin card) {
+        super(card);
+    }
+
+    @Override
+    public CallidusAssassin copy() {
+        return new CallidusAssassin(this);
+    }
+}
+
+class CallidusAssassinApplier extends CopyApplier {
+
+    private static final FilterPermanent filter
+            = new FilterCreaturePermanent("other target creature with the same name as this creature");
+
+    static {
+        filter.add(CallidusAssassinPredicate.instance);
+        filter.add(AnotherPredicate.instance);
+    }
+
+    @Override
+    public boolean apply(Game game, MageObject blueprint, Ability source, UUID targetObjectId) {
+        Ability ability = new EntersBattlefieldTriggeredAbility(new DestroyTargetEffect())
+                .setTriggerPhrase("When this creature enters the battlefield, ");
+        ability.addTarget(new TargetPermanent(0, 1, filter));
+        blueprint.getAbilities().add(ability);
+        return true;
+    }
+
+    @Override
+    public String getText() {
+        return "except it has \"When this creature enters the battlefield, " +
+                "destroy up to one other target creature with the same name as this creature.\"";
+    }
+}
+
+enum CallidusAssassinPredicate implements ObjectSourcePlayerPredicate<Permanent> {
+    instance;
+
+    @Override
+    public boolean apply(ObjectSourcePlayer<Permanent> input, Game game) {
+        return CardUtil.haveSameNames(input.getObject(), input.getSource().getSourcePermanentOrLKI(game));
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/Warhammer40000.java b/Mage.Sets/src/mage/sets/Warhammer40000.java
index 5f24fd015e8..4ae37685077 100644
--- a/Mage.Sets/src/mage/sets/Warhammer40000.java
+++ b/Mage.Sets/src/mage/sets/Warhammer40000.java
@@ -55,6 +55,7 @@ public final class Warhammer40000 extends ExpansionSet {
         cards.add(new SetCardInfo("Bred for the Hunt", 222, Rarity.UNCOMMON, mage.cards.b.BredForTheHunt.class));
         cards.add(new SetCardInfo("Broodlord", 89, Rarity.RARE, mage.cards.b.Broodlord.class));
         cards.add(new SetCardInfo("Caged Sun", 231, Rarity.RARE, mage.cards.c.CagedSun.class));
+        cards.add(new SetCardInfo("Callidus Assassin", 109, Rarity.RARE, mage.cards.c.CallidusAssassin.class));
         cards.add(new SetCardInfo("Canoptek Scarab Swarm", 150, Rarity.RARE, mage.cards.c.CanoptekScarabSwarm.class));
         cards.add(new SetCardInfo("Canoptek Spyder", 151, Rarity.RARE, mage.cards.c.CanoptekSpyder.class));
         cards.add(new SetCardInfo("Canoptek Tomb Sentinel", 152, Rarity.RARE, mage.cards.c.CanoptekTombSentinel.class));