Identity Thief (EMN) from Eldritch Moon, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Magali Villeneuve
• Card Text:
  Whenever Identity Thief attacks, you may exile another target nontoken creature. If you do, Identity Thief becomes a copy of that creature until end of turn. Return the exiled card to the battlefield under its owner's control at the beginning of the next end step.