Anware, the Returner

Insidious {x} - {b},{t} ({b},{t}, Exile another card with converted mana cost {x} from your graveyard where {x} is equal to the number of Zombies on the battlefield.: You may cast this card from your graveyard until end of turn.)
"Even the undead seek companionship and love, they just go about it in a very forceful way"
- Vardan, High Preist