Seeker of the Forgotten

When Seeker of the Forgotten enters the battlefield, return a creature card from your graveyard to the battlefield with a +1/+1 counter on it and as a Black Zombie Creature in addition to it's other colors and types.
Whenever a creature dies, exile it instead. At the beginning of your next upkeep, return that creature to the battlefield with a +1/+1 counter on it and as a Black Zombie Creature in addition to it's other colors and types.