First duel on unidentified desert moon The Duel on unidentified desert moon was a lightsaber duel fought in the year 19 BBY , between Jedi Shadow Celeste Morne and the Dark Lord of the Sith Darth Vader , on a desolate moon orbiting a gas planet . Prelude . Determined to get rid of the infamous " Jebble Box " , the crew of the " Uhumele " landed on a moon to sell it to Fane Peturri , a well known scholar and historian . Unknown to the " Uhumele ' s " crew , Peturri was also an agent of the Sith Lord Darth Vader , who learned of the ship ' s cargo from the Phindian crewmember Janks . After having the crew cuffed to poles , Peturri began looking through a holographic message left by a Snivvian crimelord , detailing his " memoirs " , the Muur Talisman , Jebble and rakghoul s , which was interrupted by his Jedi friend , Zayne Carrick . Peturri used the hologram to explain to Vader that he believed the Jebble Box contained the Muur Talisman , and also , a Jedi from forty centuries past . Against Peturri ' s warnings about the talisman , Vader slashed the crate holding Dreypa ' s Oubliette to open it , finding a young woman , Celeste Morne , inside , with the Muur Talisman attached to her neck . In a panic , Peturri put on a helmet to avoid infection . Celeste awoke , expecting to see Zayne Carrick , but still felt the spirit of Karness Muur alongside her . Muur cursed his enemy . Remulus Dreypa , and his oubliette upon their release from the millennia imprisonment . Confused , Celeste asks Peturri about a Covenant , the rakghouls , the Mandalorians , their conquest and the Republic . Peturri informed her that the Sith overthrew the Republic at which point she attacked Vader . The duel . Celeste faced off against Vader with her lightsaber and deflected blaster bolts from clone troopers . Despite the taunts of Vader , who sought a powerful apprentice he could use to overthrow Palpatine , and of Muur , who sensed Vader could unleash the Muur Talisman ’ s full power , Celeste reaffirmed her determination to keep it from him . Nonetheless , Vader overpowered Celeste in combat , but the Sith Lord hesitated to kill her and claim the talisman , realizing that to wield the talisman would merely be to trade slavery to Palpatine for slavery to Muur . Assuming Vader was distracted by the duel , Fane Peturri attempted to take the opportunity to flee the moon . However , with Celeste subdued and held by clone troopers , Vader was able to block him , and correctly identified Peturri as an agent of Palpatine himself , sent to spy on Vader . Vader revealed that while Force - sensitivity protected both himself and Celeste from the rakghoul plague , a mere environment suit could not protect Peturri from Sith magic . Accordingly Peturri mutated into a rakghoul and Vader immediately slew it . With Vader distracted by the rakghoul Peturri , Celeste threw away the clones guarding her and recovered her lightsaber , and re - engaged Darth Vader . During the chaos Schurk - Heren was able to subdue a clone trooper and steal a blaster , which he used to free the rest of the " Uhumele ’ s " crew . They immediately ran for their ship , intending to escape . Aware of the inevitability of her defeat , Celeste chose to utilize the full power of the Muur Talisman to prevent Vader from claiming it , immediately turning all clone troopers present into rakghouls – and , unfortunately , Crys Taanzer . Schurk - Heren was forced to shoot the newly infected Crys , at which point the remaining crew of the " Uhumele " made their escape . Aftermath . Suddenly outnumbered , Darth Vader was forced to flee the battle and retreated to his shuttle , having realized both that Celeste could not serve as his apprentice and that the Talisman would not serve his purpose . Celeste , without any means of leaving the world , then settled in to wait with her rakghoul servants until some other would arrive , content in the knowledge that Karness Muur was left just as trapped as she .