diff --git a/Mage.Sets/src/mage/cards/c/Copycrook.java b/Mage.Sets/src/mage/cards/c/Copycrook.java
new file mode 100644
index 00000000000..a7c0b1bf413
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/c/Copycrook.java
@@ -0,0 +1,63 @@
+package mage.cards.c;
+
+import mage.MageInt;
+import mage.MageObject;
+import mage.abilities.Ability;
+import mage.abilities.common.AttacksTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.EntersBattlefieldEffect;
+import mage.abilities.effects.common.CopyPermanentEffect;
+import mage.abilities.effects.keyword.ConniveSourceEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.constants.Zone;
+import mage.filter.StaticFilters;
+import mage.game.Game;
+import mage.util.functions.CopyApplier;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class Copycrook extends CardImpl {
+
+    public Copycrook(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{U}{U}");
+
+        this.subtype.add(SubType.SHAPESHIFTER);
+        this.subtype.add(SubType.ROGUE);
+        this.power = new MageInt(0);
+        this.toughness = new MageInt(0);
+
+        // You may have Copycrook enter the battlefield as a copy of any creature on the battlefield, except it has "Whenever this creature attacks, it connives."
+        this.addAbility(new SimpleStaticAbility(Zone.ALL, new EntersBattlefieldEffect(
+                new CopyPermanentEffect(StaticFilters.FILTER_PERMANENT_CREATURE, new CopycrookApplier()),
+                "you may have {this} enter the battlefield as a copy of any creature on the battlefield, " +
+                        "except it has \"Whenever this creature attacks, it connives.\"", true
+        )));
+    }
+
+    private Copycrook(final Copycrook card) {
+        super(card);
+    }
+
+    @Override
+    public Copycrook copy() {
+        return new Copycrook(this);
+    }
+}
+
+class CopycrookApplier extends CopyApplier {
+
+    @Override
+    public boolean apply(Game game, MageObject blueprint, Ability source, UUID copyToObjectId) {
+        blueprint
+                .getAbilities()
+                .add(new AttacksTriggeredAbility(new ConniveSourceEffect())
+                        .setTriggerPhrase("Whenever this creature attacks, "));
+        return true;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/ModernHorizons3.java b/Mage.Sets/src/mage/sets/ModernHorizons3.java
index 4a79224891a..e86ae1dc9ca 100644
--- a/Mage.Sets/src/mage/sets/ModernHorizons3.java
+++ b/Mage.Sets/src/mage/sets/ModernHorizons3.java
@@ -37,6 +37,7 @@ public final class ModernHorizons3 extends ExpansionSet {
         cards.add(new SetCardInfo("Chthonian Nightmare", 83, Rarity.RARE, mage.cards.c.ChthonianNightmare.class));
         cards.add(new SetCardInfo("Collective Resistance", 147, Rarity.UNCOMMON, mage.cards.c.CollectiveResistance.class));
         cards.add(new SetCardInfo("Conduit Goblin", 179, Rarity.COMMON, mage.cards.c.ConduitGoblin.class));
+        cards.add(new SetCardInfo("Copycrook", 55, Rarity.UNCOMMON, mage.cards.c.Copycrook.class));
         cards.add(new SetCardInfo("Cranial Ram", 180, Rarity.COMMON, mage.cards.c.CranialRam.class));
         cards.add(new SetCardInfo("Cursed Mirror", 279, Rarity.RARE, mage.cards.c.CursedMirror.class));
         cards.add(new SetCardInfo("Deep Analysis", 268, Rarity.UNCOMMON, mage.cards.d.DeepAnalysis.class));