Nicol Bolas, the Sorcerer

+2: Exile the top card of each player's library. Until end of turn, you may play those cards without paying their mana costs.
-4: Nicol Bolas, the Sorcerer deals 7 damage to each creature and planeswalker you don't control.
-12: Each opponent exiles all permanents he or she controls. You draw cards and gain life equal to the number of permanents exiled this way.