The Unnamed Saga
Corstina Arunsun is a high ranking Elven magician within the Blackstaff hierarchy; rumored to be a direct descendant of Khelben “Blackstaff” Arunsun himself.
She possesses intimate knowledge of Netheril lore and was able to identify the rough location of a ruined fortress in the Sword Coast Mountains north of Waterdeep, called Karsus’ Matamani which translated from the ancient Netherese to Karsus’ Hope. The citadel had been of some importance to Karsus, a famous wizard who had been responsible for the fall of the ancient Nethril Empire and the accompanying first collapse of magic that had ravaged the world. The party located this abandoned city and found the portal to Calvakos’ extra-dimensional prison concealed in its ruins.