Citadel of the Lost/Watchtower

 Oh, you should've seen the smile on Xavier's face when Sabrina gave him this place.

Archives

 * /Archive 1/
 * /Archive 2/
 * /Archive 3/
 * /Archive 4/
 * /Archive 5/
 * /Archive 6/
 * /Archive 7/
 * /Archive 8/