Ssassuzlit is an ancient, powerful and Evil archmage, most likely hailing from northern Khul after the Great War against Chaos, although some believe that this evil spellcaster was one of the leaders of the Evil armies during that war.
Certainly, the tome titled The Three Hundred and Thirty Incantations of Ssassuzlit was left hidden in Kabesh many decades ago. Knowledge of its whereabouts was unclear for many years, until Kanestin pieced together the clues and found his way to Kabesh. There, he met a hero who found for him the ancient tome, in exchange for information. Since, receiving the tome, Kanestin has disappeared and is thought to be mastering its contents.