Fields of Blood
The Fields of Blood is overseen by Deathbride. Here, lifeless near-corpses of the undying and undead of the Legions of the Dead are born from plants that drink blood and cocoon them as a type of disgusting womb. She is the master animator for the Lich Lords armies and commands many animations and ghouls herself.
The Blood Vurms were originally created by Gorvyrm, Master of the Blood Vurms in The Fields of Blood. Some of their stock was once stolen from the The Fields of Blood by the Orrish to create their Bloodworms pits.