Caller of the Forgotten

Whenever another Zombie enters the battlefield under your control, draw a card. Then, if that creature was a token, discard a card.
Creature cards in your graveyard have unsettle. (Whenever one or more of those cards leaves your graveyard, create that many 2/2 black Zombie creature tokens.)
"The dead do not feel the touch of time: only a cold, lifeless eternity."