Uldun, The Watcher

+2: Draw a card for each card players have drawn this turn. You may play an additional land this turn
-4: Uldun deals six damage to any target. Reveal the top card of your library. If it has CMC 4 or less, you may cast it without paying it's mana cost
-8: You get an emblem with "You may choose to play with your library face up". Exile all nonland permanents.