Candelabra of the Endtimes

{t}: Add {b}.
{2}{b}{b}, {t}, exile Candelabra of the Endtimes: put all creature cards from all graveyards onto the battlefield under your control. Activate this ability only if you control no Swamps or nonartifact black permanents.
It is said that when the final flame is doused, the Old Gods and their new-raised army will descend upon the world like a plague.