Xenagos, the Reveler

+1: Add X mana in any combination of {r} and/or {g} to your mana pool, where X is the number of creatures you control.
0: Put a 2/2 red and green Satyr creature token with haste onto the battlefield.
-6: Exile the top seven cards of your library. You may put any number of creature and/or land cards from among them onto the battlefield.