Baba Osuleg

Said to live in an isolated hut made from the bones of fallen Ungols, the hideous Baba Osuleg trains a large community of the tainted deep in the Troll Country. However, Osuleg recently developed a mutation, and her centuries of service will mean nothing if the wise women find out. So, Osuleg is making preparations to hold them off, as her work is more important than an extra limb or two, and cannot be allowed to stop.

Source
pg. 44
 * Warhammer Fantasy RPG 2nd Edition -- Realm of the Ice Queen