The fortress in question has a chilling history. Thousands of years earlier, the Sacred Ancestor's army laid siege to it, because the Nobles there had taken to worshipping a tentacled "god" named Kururu. Vampires, it seems, do not have much of a knack for taking their own lives, so they wanted this dark god to destroy the whole world, themselves included. Three hundred believers in the fortress were able to hold out against 30,000 attackers for thirteen months due to their great faith and the power their "god" gave them. That same number of troops was killed in a single day, with only Arch Duke Valcua surviving the incident. Finally, the Sacred Ancestor alone made it through the doors and came out a year later—apparently so exhausted that he slept for the next century. But no one has been inside in the last 5000 years.