From the Abyss

Target Killer card in your graveyard and send it
to the facedown pile. Put 3 counters on this card.
During your draw phase, remove a counter.
When this card has no more counters on it
during your draw phase, tap {3} and cast
facedown card. Its power and toughness are
reduced by -1/1 .
Flashback {2}{b}{b}(You may cast this card from your
graveyard for its flashback cost. Then exile it.)