Nuzith, the Dark Oppressor

Flying, Double Strike
Oppression Blades-Whenever this creature attacks,
take control of target creature, that creature gains {t}: add {c} and loses all other abilities
Cruel Torment-At the beginning of your upkeep, creatures you control that you don't own get
-1/-1, then deal 1 damage to each opponent for
each creature you control that you don't own