Azrim, the Butcher of Death

Harvest of Souls - Sacrifice a creature: Deal damage equal to that creature’s toughness to any target.

Carnage Walker - Whenever Azrim kills a creature with a toughness greater than 4, return target creature from your graveyard to your hand.

Grim Harvest - At the beginning of your upkeep,
if a creature died last turn, Azrim gains lifelink until end of turn.