Ulcaster is the ghost of the former principal of the Ulcaster School of magic. He haunts the site of the ruined school at night, near the entrance to Ulcaster Dungeon at 3060, 670. Speak to him (repeatedly) to receive the quest Tomes of Magic. If you talk to Ulcaster while carrying the Ancient Armor from the Firewine Ruins and the Idol of Kozah from the Archaeological Site south of the Lighthouse area, he will swap them for the cursed sword The Vampire's Revenge.