Vraska, Trophy Hunter

+1: Until your next turn, whenever a creature deals combat damage to Vraska Trophy Hunter, destroy that creature.
-2: Target creature loses flying and gains defender. It becomes a colorless artifact in addition to its other types with base power and toughness 2/2
-7: Destroy up to four nonland permanents, if any colorless would die this way, you may put them on the battlefield under your control instead.