Tzeentch, Changer of Ways

+3: Each player shuffles their graveyard, mills 9, puts the bottom 9 cards from their graveyard on top of their library, then shuffles their library.
0: An opponent discards two cards that you randomly select from their hand.
-12: Shuffle your library, graveyard, and exile. Play the top 9 cards from your library, graveyard, or exile without paying their mana cost