Vraska, the Silencer [OTJ - 237]

Rarity: M #: 237 Creature Type or Sub Type: Legendary Creature — Gorgon Assassin P: 3 T: 3 Rules Text Contains: Deathtouch Whenever a nontoken creature an opponent controls dies, you may pay 1. If you do, return that card to the battlefield tapped under your control. It's a Treasure artifact with "T, Sacrifice this artifact: Add one mana of any color," and it loses all other card types.