Spirit Reaper

Whenever a creature you control dies, each
opponent loses X life and you gain X life, where
X is equal to your devotion to white and black.
{t}, Sacrifice a creature: Return another target
creature from your graveyard to your hand.
"In order to obtain anything, something of equal
value is required... a life for a life... a soul for a soul."
—Athreos, God of Passage