Melascula, Vengeful Soul

Flying, lifelink.
Whenever a creature dies, exile it. Its owner receives a 2/2 Zombie that attacks its own controller each turn if it is able. The creatures exiled this way stay this way until its associated Zombie has left the battlefield.
{3}{u}{b}{t}: Sacrifice or destroy a Zombie on the battlefield: Take two creatures from the Zombie controller's exile and combine them under your control. They share power and toughness and all abilities.