Chandra, Unforgiving

+2: Reveal the top card of your library, target opponent may have you draw that card or put it back on top and take damage equal to its mana cost.
-3: until your next turn, creatures you control gain, afflict 4.
-X: Exile the top X cards of your library, you may cast cards from among them with Converted mana cost X or less without paying the mana cost.