Herma-Mora (as he is known in the Nordic religion) A.K.A. Hermaeus Mora.
Ancient Atmoran demon who, at one time, nearly seduced the Nords into becoming Aldmer. Most Ysgramor myths are about escaping the wiles of old Herma-Mora. Also called the Demon of Knowledge, he is vaguely related to the cult origins of the Morag Tong ('Foresters Guild'), if only by association with his brother/sister, Mephala.