Darth Rivan Darth Rivan was a Zelosian male who was a Sith Lord during the time of the New Sith Wars , having taken his Sith name from a corrupted Sith manuscript which identified Darth Revan , the Dark Lord of the Sith who was redeemed during the Jedi Civil War , as " Rivan . " Biography . During the New Sith Wars , Darth Rivan visited the uncharted Cularin system and settled on the planet Almas , despite this world ' s inhospitable atmosphere . There , he built a fortress , intending to delve in the mysteries of the dark side . Rivan ' s " true " purpose for constructing the fortress , however , lay in the creation of Sith battlelord s . Rivan ' s vision for this elite new corps lay in the very nature of the dark side itself ; specifically , in its inherent discord . Whenever many darksider s gathered in one location , sooner or later some of them would die , or turn on one another . Enlightened inter - cooperation was not held to be a virtue by darksiders . Eliminating insubordination amongst the Sith ranks became a mission of Rivan ' s , and his creation of the battlelord would serve to Force bond a commander to his troops — if a soldier attempted to harm his / her commander , the intended wound would instead be inflicted upon the soldier . Analysis of the fortress performed shortly after the Battle of Naboo revealed that the dome on the fortress was well over 1 , 000 years old . The fortress itself was essentially a gigantic dark side focal - point , capable of shooting lightning at passing starships . The castle was plagued with mechanical traps which could not be detected with the Force or with advanced technological means . Rivan would use Mandalorian iron , resistant to the Force and to the lightsaber , to keep his most valued books , and for the floor of his lightsaber training room . He also designed the fortress so that his slaves / prisoners ( which included at least one Jedi ) would be cut off from the Force , feeling absolutely lost and despaired . Darth Rivan wrote his autobiography in Sithese in the inner walls of his fortress . Darth Rivan was known for being the wielder of the powerful artifact known as the Darkstaff , a semi - sentient weapon capable of draining Force - essence from a living being . Darth Rivan also created the kaluthin grass to modify the planet ' s landscape and atmosphere , and make it breathable . Although the kaluthin terraformed Almas to a gardenlike place , it could not remove the noxious local gases and Almas ' s atmosphere would never be exactly pure . Rivan lived in Almas for decades until driven off by the Jedi Knights , at some point before 1250 BBY . During the Battle of Almas , the Jedi destroyed Rivan ' s fortress structure , although the core tower , impervious to blaster fire , survived the attack . In the end , it was known that Rivan ' s quest for physical immortality never truly succeeded . It was initially believed that , after being driven off Almas by a massive Jedi / Republic assault , Darth Rivan barely escaped with his life , and eventually perished after being betrayed by his fellow Sith — specifically , his own apprentice , Darsin . In actuality , however , Rivan left the fortress one day leaving Darsin behind , and Darsin died before Rivan , his body modified by Rivan ' s alchemies to create a slave Force spirit . Rivan managed to harness the power of the Darkstaff to create a Force storm that swept him through time and space to the planet Ruusan , during the battles between the Jedi Army of Light and the Sith Brotherhood of Darkness several centuries later . There , with his Force power drained by the Darkstaff , he was easily slain by a Force - sensitive warrior , someone who had been another apprentice of Rivan ( but not Darsin ) . Rivan could not be buried in the crypt he had created for himself . Portions of Rivan ' s journals were excavated and recovered from his Almas fortress during the Clone Wars , and presented to the Jedi Council on Coruscant for study . Talents . Rivan was well known for the power to form the Sith battlelord s . Rivan has shown in his fortress that he studied and applied himself to mastering the dark side . Rivan ' s most noticeable creation was the kaluthin grass to modify the planet Almas ' atmosphere in order to make it breathable . Behind the scenes . Rivan is chronologically the last known Darth before Darth Bane . Initially , Bane was believed to be the inventor of the title , as at that point , no earlier Sith Lords used it . It was later revealed that the title " Darth " originates in the Mandalorian Wars , or even earlier . Darth Rivan predates Bane , author of the Rule of Two . However , one of the traps in Darth Rivan ' s fortress , as shown in " A Mon Alone " , is based on the Sith adherence to the Rule of Two . Rivan has never actually been featured or mentioned in a story . So far , both he and the Almas fortress have only been mentioned in source books and role playing scenarios .