Kozilek, Bane of Thought

+2: Target opponent gets an emblem with "Your maximum hand size is reduced by three" and "If you would discard a card, exile it instead."
-4: Gain control of any number of target creatures whose total combined power is less than or equal to the number of loyalty counters on Kozilek.
-13: Each opponent exiles his or her library, then shuffles his or her hand and graveyard into his or her library.