Dustcaster Necromancer

Other Zombie creatures in your graveyard have Unearth {1}{b}{r} ({1}{b}{r}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
Whenever another creature leaves the battlefield, put the top two cards of your library into your graveyard.
Graves are shallow in shifting sands.