The estate of the rogue Sith Lord Grathan is a miniature fortress, reinforced by cutting-edge weapons technology and experimental shielding. Lord Grathan's cadre of scientists are constantly upgrading the defenses to ensure that air strikes fail to do harm‒only ground-based attacks can do real damage. It's the perfect place for a rogue Sith Lord to make his stand.
Lord Grathan has been reinforcing his territory and adding sublevels to his manor for years, suggesting that his plan to declare himself the thirteenth Dark Council member has been in progress longer than many assume. Any number of traps and treasures may exist deep underground, guarded by Grathan's personal guards and automated war droids.