On a single night in 1347 DR the dark stone and iron fortress called Castle Perilous was raised by the work of demons of the Abyss. It was located on a rocky crag on the shore of the Lake of Tears in Vaasa. It was the seat of power for the lich Zhengyi, the Witch-King of Vaasa. With the aid of his demon patron Orcus, Zhengyi gathered an army of dire wolves, giants, goblins, orcs, and undead to conquer Damara.