I've just finished reading Elminster Enraged and in it he encounters a creature called a Glaragh in the Underdark. It's a worm-like creature of colossal size which has six arms it can retract and is able to use some sort of epic psi-blast. It's also an Outsider and appears to be from the Nine Hells.
Has anyone got any idea on 3.5 stats for this please?