The JARVIS dungeon is on the first level, far back left corner of Blackthorns's castle.
This dungeon cannot be recalled into or out. Only way in or out is through Blackthorn's castle.
Once inside the dungeon, you'll find it full of traps. Blade, saws, poison and so forth(you know, usual dungeon stuff). Also calling this place home are a diverse group of creatures call experiments alongside: mages, technicians, zeons of exodus and Stratos.
Experiments followed by a "#.#" are regular spawns and usually a little tougher than their counter part experiments follo