Grave Singer

Hexproof, Flying, Vigilance, Haste, Flash, Lifelink

When Grave Singer enters the battlefield mill
X where X is the number cards in your graveyard
and search your library for Zombie Fabricator.

{b}{b}: Return all cards from your graveyard to the battlefield without playing their mana cost.

{b}: Put any number of cards from your hand or
library into the graveyard.