The Castellan restraints were a brainwashing technique employed by the Sith Empire's Intelligence Service during the Cold War and Galactic War. A candidate for Castellan conditioning was primed using IX serum, distilled from the chemical dimalium-6 found on Quesh and specifically formulated for its subject. It took anywhere from three to thirty days to circulate through the subject, altering their brain chemistry to make them more susceptible; after the serum was fully absorbed, the subject was imprinted with a code word that opened the affected mind and forced them to obey the subsequent commands. The process was believed to be irreversible; Imperial Intelligence's archives indicated that the imprinting process could be used again to reset the programming, but repeated use of the IX serum