Agony, Altar of the Unholy

Lifelink
{2}{w}, {t}: You gain X life, where X is the number of creatures that died this turn.
{3}{b}, {t}: Return target creature card from
your graveyard to your hand.
{4}{r}, {t}: Sacrifice another creature. Agony, Altar of the Unholy deals damage equal to
its power to any target.