Duel on Doan This duel took place in 980 BBY between Dark Lord of the Sith Darth Bane and his apprentice , Darth Zannah , in the Stone Prison on the planet Doan . Bane , who had been separated from his lightsaber , managed to hold Zannah off with his Force powers long enough to explode one of the detonators in the prison wall , causing the stones to crash down between them and separate them , ending the duel . Prelude . Twenty years after accepting Darth Zannah as his first apprentice , Dark Lord of the Sith Darth Bane began to perceive Zannah as weak ; she had not yet decided to attack him and take up the mantle of Sith Master . Bane began to wonder whether or not Zannah was worthy to be his apprentice , and decided to search for Darth Andeddu ' s holocron , which was said to hold the secret of eternal life . Bane sent Zannah on a mission to the planet Doan to search for Sith artifacts while he secretly searched for the holocron . However , during her mission Zannah decided that the time had come for her to challenge her master . On Doan , she found evidence that a Dark Jedi was also searching for Sith artifacts . Zannah tracked the Dark Jedi , whose name was Set Harth , to Nal Hutta , where she confronted him and offered him the chance to become her Sith apprentice ; and Harth accepted . Meanwhile , Bane returned to his home on Ciutric IV , where he was ambushed by an assassin , the Huntress and about twenty mercenaries hired by Princess Serra to capture Bane , as she mistakenly believed he had killed her father . The group captured Bane and the Huntress took his lightsaber . Zannah and Harth then returned to find that Bane had been captured by the Doan Royal Guard . Bane was taken to the Stone Prison on Doan , where he was kept incapcaitated and tortured by drug injections . Serra interrogated him , but Lucia , Serra ' s bodyguard — who had previously served under Bane , then known as Dessel , as a member of the Brotherhood of Darkness ' s Gloom Walkers — realized that Serra had become corrupted by her desire for revenge , and secretly freed Bane . Meanwhile , Zannah and Harth arrived and Zannah began to search for her master . The duel . Bane attempted to find and kill Serra , but he was confronted by Lucia , who attempted to convince Bane that Serra was actually a good person . Bane began to gather his power to kill Lucia , only to be hit by a powerful blast from Zannah , who had finally found him . Lucia was killed , but Bane threw up a shield which protected him from damage ; and he quickly jumped to his feet . Zannah and Bane began a heated argument in which Zannah accused Bane of defying the Rule of Two by trying to extend his life , only to have him chastise her for waiting until age weakened him before challenging him . Bane managed to dodge Zannah ' s initial strikes , but was in a full retreat , shooting bolts of Force lightning at Zannah ' s boots to hold her at bay . Bane jumped over her and she kicked at him ; however , he caught her boot and attempted to break her leg . She rolled with the move and struck at Bane with her lightsaber , but he dodged the blow . She cornered him and moved in for the kill , but he shot a particularly powerful blast of Force lightning at her , causing her to stagger back a few steps and giving him room to escape from the corner . She rushed back in , striking with her lightsaber again , but Bane threw up a purple cocoon of dark side energy . As her blade hit the cocoon it released its energy , throwing Bane back into the wall and sending Zannah ten meters across the hall . An alarm then signaled ; Serra had activated a series of detonators set to collapse the entire prison . As she moved back in toward Bane , he shot two bolts of lightning past her ear into the wall ; they hit a demolation charge . Zannah used the Force to shield herself from the resulting explosion , which caused the stone walls and ceiling of the passage to collapse between them , separating them with stones that would take hours to clear , even with the Force . The two then fled the prison ; as Bane left he met with the Huntress , who returned his lightsaber to him and submitted herself to his teachings . Aftermath . Bane ' s new apprentice tracked Serra through the Force and discovered she had returned to her father ' s home on Ambria . Bane sent out a distress call to Zannah ' s ship in an effort to lure her to the farm and kill her , and Bane had the Huntress kill Serra . Zannah then arrived , and she and Bane engaged in another duel .