Ashiok, Nightmare Weaver {1}{U}{B}
Legendary Planeswalker — Ashiok
+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.
Loyalty: 3