Momir Vig, Infiltrator

+2: Create a 1/4 blue Kraken Rogue creature token with shroud or a 2/1 black Fairy Rogue creature token with shadow.
-2: Target player draws four cards and then discards four cards.
-4: Reveal the top card of target player's library, you may cast it for its mana cost. If you do not, put it into their graveyard.