Renegade Doppelganger

Renegade Doppelganger

Creature - Shapeshifter | Power/Toughness: 0 / 1 (CMC 2)
Whenever another creature enters the battlefield under your control, you may have Renegade Doppelganger become a copy of that creature until end of turn. (If it does, it loses this ability for the rest of the turn.)