Ashiok, Nightmare Weaver

Ashiok, Nightmare Weaver

Legendary Planeswalker - Ashiok | Loyalty: 3 (CMC 3)
+2: Exile the top three cards of target opponent's library.
-X: Put a creature card with mana value X exiled with Ashiok, Nightmare Weaver onto the battlefield under your control. That creature is a Nightmare in addition to its other types.
-10: Exile all cards from all opponents' hands and graveyards.