Carlos, Assassin Master

+1: Create two 1/2 blue and black Specter creature token with "Whenever this creature deals combat damage to a player, you may draw a card."
+1: look at the top three cards of your library. Draw one or two of them and put the rest into your graveyard. You may discard a card to repeat.
-X: Exile Carlos, Assassin Master. Destroy each nonland permanent with converted mana cost equal X or less.