Spirit of Life and Death

Bloodthirst X (This creature enters the battlefield with X +1/+1 counters on it, where X is
the damage dealt to your opponents this turn.)
Whenever Spirit of Life and Death deals damage to a player, you may remove X +1/+1 counters from it. If you do, return target creature card
with converted mana cost X from your graveyard to the battlefield.
Rarely seen, but always perceptible.