The 12 Spheres an their leaders are: The Sphere of Ancient Knowledge - Darth Thanaton The Sphere of Biotic Science - Darth Acharon The Sphere of Defense of the Empire - Darth Marr The Sphere of Expansion and Diplomacy - Darth Ravage The Sphere of Imperial Intelligence - Darth Jadus The Sphere of Laws and Justice - Darth Mortis The Sphere of Military Offense - Darth Arho The Sphere of Military Strategy - Darth Decimus The Sphere of Mysteries - Darth Rictus The Sphere of Production and Logistics - Darth Vowrawn The Sphere of Sith Philosophy - Darth Aruk The Sphere of Technology - Darth Acina