Fleshgrafter

({p/b} can be paid with either {b} or 2 life.)
Fleshgrafter enters the battlefield with a -1/-1
counter on it for each 2 life you paid to cast it.
{2}{p/b}: Exile target creature card from a graveyard,
then put a number of +1/+1 counters on Fleshgrafter equal to that creature's power and
you gain life equal to that creature's toughness.
Death enabled by life.