Megumin, Crimson Demon

+3: Exile the top card of your library. You may play it at any time. Megumin deals damage to target creature/player equal to its converted mana cost.
0: Create a 4/4 Chomusuke creature token with "Whenever this creature attacks or blocks, it deals 4 damage to target creature."
-X: Megumin deals X damage to each creature you don't control. During your next turn, you cannot activate abilities of Megumin, Crimson Demon.