Victim, 8th Floor Guardian

Flying
{3}{w}{b}, {t}, Sacrifice Victim, 8th Floor Guardian:
All creatures get -3/-3 until the end of the turn.
Exile all creatures in your opponents graveyards
that were put there from the battlefield this turn.
At the beginning of your combat phase, you may return Victim, 8th Floor Guardian from your graveyard to the battlefield tapped.