Vraska, the Silencer (Showcase) (OTJ-299) - Outlaws of Thunder Junction: (Showcase) (Borderless)

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 ", Sacrifice this artifact: Add one mana of any color," and it loses all other card types.