Nox, Titan of Night's Legions

When Nox enters the battlefield, sacrifice it unless it escaped.
When Nox enters the battlefield or attacks, each player puts the top three cards of their library into their graveyard. For each creature card put into a graveyard this way, create a tapped 2/2 black Zombie creature token.
Escape—{u}{u}{b}{b}, Exile five other cards from your graveyard.