Darkened Mass

If you cast this spell from your graveyard, you
lose 2 life and draw a card. Creatures you control
gain persist until end of turn. (When this creature
dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner’s control with a -1/-1
counter on it.)
Flashback—{b}{p/b}{p/b} (You may cast this card from
your graveyard for its flashback cost. Then exile it.)