Cadaver Convoker

When Cadaver Convoker enters the battlefield,
return target creature card with mana value 2 or
less from your graveyard to the battlefield. That creature is a black Zombie in addition to its other colors and types.
Whenever a creature card leaves your graveyard,
you gain 1 life.
"Curse these lands and the undead that walk them!"
— Greyhawk