Ashiok, Nightmare Herald

+2: Target player puts the top four cards of their library into their graveyard. Draw a card.
-3: Exile target creature or planeswalker with converted mana cost equal to or less than the number of creature cards in its controller's graveyard.
-10: Emb: "During your turn, you may cast two cards with different types from a graveyard without paying their costs. If you do, exile them."