diff --git a/Mage.Sets/src/mage/cards/m/MordenkainensPolymorph.java b/Mage.Sets/src/mage/cards/m/MordenkainensPolymorph.java
new file mode 100644
index 00000000000..7c87f746552
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/m/MordenkainensPolymorph.java
@@ -0,0 +1,84 @@
+package mage.cards.m;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.ContinuousEffectImpl;
+import mage.abilities.keyword.FlyingAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.target.common.TargetCreaturePermanent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class MordenkainensPolymorph extends CardImpl {
+
+    public MordenkainensPolymorph(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{1}{U}");
+
+        // Until end of turn, target creature becomes a Dragon with base power and toughness 4/4 and gains flying.
+        this.getSpellAbility().addEffect(new MordenkainensPolymorphEffect());
+        this.getSpellAbility().addTarget(new TargetCreaturePermanent());
+    }
+
+    private MordenkainensPolymorph(final MordenkainensPolymorph card) {
+        super(card);
+    }
+
+    @Override
+    public MordenkainensPolymorph copy() {
+        return new MordenkainensPolymorph(this);
+    }
+}
+
+class MordenkainensPolymorphEffect extends ContinuousEffectImpl {
+
+    MordenkainensPolymorphEffect() {
+        super(Duration.EndOfTurn, Outcome.Benefit);
+        staticText = "until end of turn, target creature becomes " +
+                "a Dragon with base power and toughness 4/4 and gains flying";
+    }
+
+    private MordenkainensPolymorphEffect(final MordenkainensPolymorphEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public MordenkainensPolymorphEffect copy() {
+        return new MordenkainensPolymorphEffect(this);
+    }
+
+    @Override
+    public boolean apply(Layer layer, SubLayer sublayer, Ability source, Game game) {
+        Permanent permanent = game.getPermanent(getTargetPointer().getFirst(game, source));
+        if (permanent == null) {
+            discard();
+            return false;
+        }
+        switch (layer) {
+            case TypeChangingEffects_4:
+                permanent.removeAllCreatureTypes(game);
+                permanent.addSubType(game, SubType.DRAGON);
+                return true;
+            case AbilityAddingRemovingEffects_6:
+                permanent.addAbility(FlyingAbility.getInstance(), source.getSourceId(), game);
+                return true;
+            case PTChangingEffects_7:
+                if (sublayer == SubLayer.ModifyPT_7c) {
+                    permanent.getPower().setValue(4);
+                    permanent.getToughness().setValue(4);
+                    return true;
+                }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return false;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/AdventuresInTheForgottenRealms.java b/Mage.Sets/src/mage/sets/AdventuresInTheForgottenRealms.java
index 4deb2caec1e..a571540325d 100644
--- a/Mage.Sets/src/mage/sets/AdventuresInTheForgottenRealms.java
+++ b/Mage.Sets/src/mage/sets/AdventuresInTheForgottenRealms.java
@@ -83,6 +83,7 @@ public final class AdventuresInTheForgottenRealms extends ExpansionSet {
         cards.add(new SetCardInfo("Manticore", 113, Rarity.COMMON, mage.cards.m.Manticore.class));
         cards.add(new SetCardInfo("Mimic", 249, Rarity.COMMON, mage.cards.m.Mimic.class));
         cards.add(new SetCardInfo("Minion of the Mighty", 156, Rarity.RARE, mage.cards.m.MinionOfTheMighty.class));
+        cards.add(new SetCardInfo("Mordenkainen's Polymorph", 65, Rarity.COMMON, mage.cards.m.MordenkainensPolymorph.class));
         cards.add(new SetCardInfo("Mountain", 274, Rarity.LAND, mage.cards.basiclands.Mountain.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Nadaar, Selfless Paladin", 27, Rarity.RARE, mage.cards.n.NadaarSelflessPaladin.class));
         cards.add(new SetCardInfo("Plains", 262, Rarity.LAND, mage.cards.basiclands.Plains.class, NON_FULL_USE_VARIOUS));