Rethgrax, Demon of Skulls

+3: Put a Skull counter on target permanent. Permanents with skull counters don't untap, and can't activate abilities unless they are mana abilities.
+3: Put a demon counter on target permanent. Permanents with demon counters gain flying, attack each turn if able, and have -1/-2.
-10: Exile all permanents that have no skull or demon counters. Separate the remaining cards. Distribute these permanents equally amongst all players.