Sif, Guardian of The Grave

Vigilance, Persist (When this creature is put into a
graveyard from play, if it has no -1/-1 counters on
it, return it to play under its owners control with a
-1/-1 counter on it.)
When Sif, Guardian of The Grave enters the graveyard from play, if it has no -1/-1 counters
on it, you may return target creature from your
graveyard to your hand.