It was built on a newly emerged volcanic island—later to be known as Terfin—after Blackthorn was manipulated by the Shadowlords. The castle's position, centered between the isle's three volcanoes, corresponded with the location where the Avatar retrieved the Skull of Mondain from the seabed in Ultima IV. Refugees from their condemned homeland, the gargoyles later founded an entirely new city upon the site, after which all traces of the palace ruins had vanished by the time of Ultima VII.