Mavash, Relic Reclaimer

+2: Mill 2, then exile two cards from graveyards. Until the end of your next turn, you may cast one of them if it's an artifact card.
-4: Destroy target permanent. If it was an artifact or an enchantment, its controller loses 3 life.
-7: Search your graveyard and/or library for a vehicle card, reveal it, put it onto the battlefield, then shuffle. It becomes a creature permanently.