Kyuss

Kyuss (Pronounced: kai OOSS) is the evil Demigod exarch of Nerull. He is known as: The Bonemaster, The Wormgod, And the herald of the age of Worms

He is a gigantic, Wriggling mass of Worms. He created the Spawn of Kyuss, Larva Mages and Larva Undead.