diff --git a/Mage.Sets/src/mage/cards/u/UnstableShapeshifter.java b/Mage.Sets/src/mage/cards/u/UnstableShapeshifter.java
new file mode 100644
index 00000000000..d5f866fe0e9
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/u/UnstableShapeshifter.java
@@ -0,0 +1,143 @@
+/*
+ *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without modification, are
+ *  permitted provided that the following conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above copyright notice, this list of
+ *        conditions and the following disclaimer.
+ *
+ *     2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *        of conditions and the following disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+ *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  The views and conclusions contained in the software and documentation are those of the
+ *  authors and should not be interpreted as representing official policies, either expressed
+ *  or implied, of BetaSteward_at_googlemail.com.
+ */
+package mage.cards.u;
+
+import java.util.UUID;
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.OneShotEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.events.GameEvent.EventType;
+import mage.game.permanent.Permanent;
+import mage.target.targetpointer.FixedTarget;
+import mage.util.functions.EmptyApplyToPermanent;
+        
+
+/**
+ * 
+ * @author HCrescent
+ */
+public class UnstableShapeshifter extends CardImpl {
+
+    public UnstableShapeshifter(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{3}{U}");
+        this.subtype.add("Shapeshifter");
+
+        this.power = new MageInt(0);
+        this.toughness = new MageInt(1);
+
+        // Whenever another creature enters the battlefield under your control, you may have Renegade Doppelganger become a copy of that creature until end of turn.
+        this.addAbility(new UnstableShapeshifterTriggeredAbility());
+    }
+
+    public UnstableShapeshifter(final UnstableShapeshifter card) {
+        super(card);
+    }
+
+    @Override
+    public UnstableShapeshifter copy() {
+        return new UnstableShapeshifter(this);
+    }
+}
+
+class UnstableShapeshifterTriggeredAbility extends TriggeredAbilityImpl {
+
+    UnstableShapeshifterTriggeredAbility() {
+        super(Zone.BATTLEFIELD, new UnstableShapeshifterEffect(), false);
+    }
+
+    UnstableShapeshifterTriggeredAbility(final UnstableShapeshifterTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public UnstableShapeshifterTriggeredAbility copy() {
+        return new UnstableShapeshifterTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == EventType.ENTERS_THE_BATTLEFIELD;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        if (!event.getTargetId().equals(this.getSourceId())) {
+            Permanent permanent = game.getPermanent(event.getTargetId());
+            if (permanent != null && permanent.getCardType().contains(CardType.CREATURE)) {
+                for (Effect effect : this.getEffects()) {
+                    effect.setTargetPointer(new FixedTarget(permanent.getId()));
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String getRule() {
+        return "Whenever another creature enters the battlefield, {this} becomes a copy of that creature and gains this ability.";
+    }
+}
+
+class UnstableShapeshifterEffect extends OneShotEffect {
+
+    public UnstableShapeshifterEffect() {
+        super(Outcome.Copy);
+        this.staticText = "have {this} become a copy of that creature and gain this ability";
+    }
+
+    public UnstableShapeshifterEffect(final UnstableShapeshifterEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public UnstableShapeshifterEffect copy() {
+        return new UnstableShapeshifterEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent permanent = game.getPermanent(source.getSourceId());
+        Permanent targetCreature = game.getPermanent(getTargetPointer().getFirst(game, source));
+        if (targetCreature == null) {
+            targetCreature = (Permanent) game.getLastKnownInformation(getTargetPointer().getFirst(game, source), Zone.BATTLEFIELD);
+        }
+        Permanent newPermanent = game.copyPermanent( targetCreature, permanent.getId(), source, new EmptyApplyToPermanent());
+        newPermanent.addAbility(new UnstableShapeshifterTriggeredAbility() , source.getSourceId(), game);
+        return false;
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/Tempest.java b/Mage.Sets/src/mage/sets/Tempest.java
index 793161f7525..ca76cf348bb 100644
--- a/Mage.Sets/src/mage/sets/Tempest.java
+++ b/Mage.Sets/src/mage/sets/Tempest.java
@@ -335,6 +335,7 @@ public class Tempest extends ExpansionSet {
         cards.add(new SetCardInfo("Tranquility", 155, Rarity.COMMON, mage.cards.t.Tranquility.class));
         cards.add(new SetCardInfo("Trumpeting Armodon", 156, Rarity.UNCOMMON, mage.cards.t.TrumpetingArmodon.class));
         cards.add(new SetCardInfo("Twitch", 99, Rarity.COMMON, mage.cards.t.Twitch.class));
+        cards.add(new SetCardInfo("Unstable Shapeshifter", 100, Rarity.RARE, mage.cards.u.UnstableShapeshifter.class));
         cards.add(new SetCardInfo("Vec Townships", 339, Rarity.UNCOMMON, mage.cards.v.VecTownships.class));
         cards.add(new SetCardInfo("Verdant Force", 157, Rarity.RARE, mage.cards.v.VerdantForce.class));
         cards.add(new SetCardInfo("Verdigris", 158, Rarity.UNCOMMON, mage.cards.v.Verdigris.class));