Nel-Emharaz, the First Lich

Indestructible, Defender (Damage and effects that say "destroy" don't destroy this creature. This creature can't attack.)
{5}{b}{u}{r}, {t}: Destroy all creatures you don't control. They can't be regenerated.
{5}{b}{u}{r}, {t}: Put all creature cards from all graveyards onto the battlefield under your control. They're black Zombies in addition to their other colors and types.