Duel on Stygeon Prime The Duel on Stygeon Prime was a confrontation in the Spire , a prison on the planet Stygeon Prime , between the Galactic Empire and a group of Lothal - based rebels who carried out an insurgency against the Empire ' s rule . The duel , primarily fought between former Padawan Kanan Jarrus and the Jedi hunter known as the Grand Inquisitor , took place in the fifth year before the Battle of Yavin , as part of a mission to rescue Jedi Master Luminara Unduli from Imperial captivity . The rebels learned that Unduli , a former member of the Jedi Council , had survived the Clone Wars and the ensuing Jedi Purge , and was being held prisoner by the Empire . However , Unduli had in reality been executed by the Empire years earlier and the residual Force essence within her bone s was being used to lure surviving Jedi to their deaths . The Grand Inquisitor , the Imperial Jedi hunter who killed Unduli , intended to trap the rebels in the Spire and kill former Padawan Kanan Jarrus and his apprentice , Ezra Bridger . The rebels infiltrated the Spire after arriving on Stygeon Prime and made their way through the facility . Jarrus and Bridger located Unduli ' s cell , where they learned she was dead and that the Inquisitor was waiting for them . Jarrus and the Inquisitor engaged in a lightsaber duel , during which the Inquisitor attempted to turn Bridger to the dark side of the Force . When the boy refused , the Inquisitor aimed to kill them both , but they were able to flee and , ultimately , escape the facility with the other rebels . The Inquisitor would nonetheless continue hunting them , intending to destroy them and all remaining Jedi . Prelude . In the years following the rise of the Galactic Empire , the Jedi who survived Order 66 — the event in which Darth Sidious , who was then - known in public as Supreme Chancellor Palpatine , ordered the clone trooper s of the Grand Army of the Republic to destroy the Jedi Order before declaring himself Emperor — were hunted down and eliminated as part of the Jedi Purge . One of the individuals responsible was the Grand Inquisitor , who was tasked by Darth Vader , Sidious ' apprentice and Dark Lord of the Sith , with killing all remaining Jedi . One such Jedi was Jedi Master Luminara Unduli , a veteran of the Clone Wars and a former member of the Jedi Council . The Inquisitor executed Unduli in the Spire , a prison on the planet Stygeon Prime . After her death , Unduli ' s bone s were kept in her prison cell , and the residual Force essence within them was used to lure other surviving Jedi to their deaths . Later in the Empire ' s reign , Sidious sensed that a new threat , which he called the " children of the Force , " could rise against him . Vader ordered the Inquisitor to find these individuals and either turn them to the dark side of the Force or kill them . Sometime later , Agent Kallus of the Imperial Security Bureau encountered a group of rebels who operated on and around the Outer Rim planet of Lothal . These rebels mounted a mission to rescue Wookiee s who had been enslaved by the Empire in the spice mines of Kessel , where Kallus followed them in an attempt to destroy them . During the rescue , the leader of the rebels , Kanan Jarrus , revealed himself as a Jedi survivor , while Ezra Bridger — a Lothal street orphan who had just become part of the rebel crew — displayed his untrained ability to use the Force . Kallus believed them to be master and apprentice and reported what he saw to the Inquisitor , who prepared a trap for them on Stygeon Prime in an attempt to kill them . Unaware of the threat posed by the Inquisitor , Jarrus took Bridger as his Padawan and began training him in the ways of the Jedi . Jarrus , a Padawan at the time of Order 66 whose training was incomplete , was unsure of his ability to train the boy , while Bridger remained undisciplined and full of doubt . After a failed training session aboard the rebels ' ship , the " Ghost " , the crew watched as a HoloNet News transmission was interrupted by Gall Trayvis , a former member of the Imperial Senate who secretly posed as a rebel sympathizer in order to lure rebel forces into traps . Trayvis claimed that Unduli was alive and that she was being held prisoner in the Stygeon system . Jarrus believed the claim , as he had heard rumors that Master Unduli had survived the Clone Wars . The rebels jumped at the chance to rescue the Jedi Master , and Jarrus believed she could be a new teacher for his apprentice . The rebels were unaware that the Inquisitor would be waiting for them , as the information about Unduli ' s survival was a trap . The rebels soon deduced that Unduli was being held in the Spire , which was the only Imperial prison in the Stygeon system . The crew gathered in the cockpit of the " Ghost " , where Sabine Wren , a Mandalorian explosives expert , projected a holographic image of the prison . She explained that the facility was impregnable , that it was blast proof , and that it was defended by ray shield s , anti - ship weapons , and TIE / ln space superiority starfighter s , and that the main landing platform would be impossible to break into . Despite what they perceived as long odds , they decided to mount the rescue and trick the facility ' s scanners into not detecting their approach . Once on Stygeon Prime , they planned to sneak onto a small entrance guarded by a few stormtrooper s , break into the prison , and then make their way into the isolation cells in the upper levels of the facility , where they would free Unduli before escaping the same way they came in . The mission . Searching for Unduli . With their plan in place , the rebels made their way to Stygeon Prime and descended into the atmosphere aboard the " Phantom " , an attack shuttle that was part of the " Ghost " ; their astromech droid , C1 - 10P , remained with the " Ghost " while the rebels went on their mission . The strike team for the infiltration consisted of Jarrus , Bridger , Wren , and the Lasat rebel Garazeb Orrelios . Hera Syndulla , the owner and pilot of the " Ghost " , would remain with the " Phantom " . Wren also brought along a few detonators , which she called " miracles , " that could be used if needed . The shuttle quietly approached the Spire , where Jarrus leaped out of the ship and landed on the small platform in front of the entrance . Once there , he began fighting the stormtroopers who guarded the entrance . Prior to receiving the order to join him , Bridger jumped out of the shuttle and landed on the platform , where he stumbled into the door and , as a result of the noise , alerted more soldiers to the rebels ' presence . Wren and Orrelios arrived to help Jarrus fight off the remaining stormtroopers , while Bridger used a lockpick to open the door . The rebels entered the Spire once the door was open , while Syndulla attached the " Phantom " to the side of the prison , powered down and using a jamming signal to avoid Imperial detection . Once inside the prison , Jarrus reached out through the Force and could sense Unduli ' s presence ; though he felt it was clouded , he still believed that she was alive . Wren , meanwhile , learned from a computer terminal that Unduli was being held in isolation on the lower levels . This necessitated a change in their plans , as they had believed that Unduli was being held in upper - level isolation cells . Jarrus began formulating a new plan as they took a turbolift to the lower levels . As they traveled to the lower levels , Syndulla continued to remain on the " Phantom " where the sensors detected an object approaching the shuttle . Though she initially believed it to be a TIE fighter , she soon found it was a group of creatures known as tibidee s , who believed that the jamming signal was a mating call and were attracted to it . Knowing that the tibidees could draw unwanted attention , Syndulla detached the " Phantom " from the side of the complex and flew it away from the prison , leading the tibidees away so as to avoid Imperial detection . The strike team soon arrived in the lower levels of the prison . Once the lift stopped , Jarrus attacked the stormtroopers guarding the lift ; Bridger was surprised at how intensely Jarrus was fighting , and Jarrus explained that he knew that there was a great deal at stake in the potential rescue of a Jedi Master , particularly if she could teach Bridger . Knowing that they would have to escape up the same elevator , Jarrus left Wren and Orrelios to guard the lift , while he and Bridger continued on towards the isolation cells . Once they reached the cell , Jarrus used a Jedi mind trick to manipulate the stormtroopers guarding the cell into believing that they were supposed to be guarding the next level . The stormtroopers left , and Jarrus and Bridger entered the cell , where they saw what they believed was Master Unduli ; in actuality , it was a holographic recording of the moments before she was executed by the Inquisitor . The two approached her , but Jarrus could sense that something was wrong . The holographic Unduli stood up and walked over to the wall , where she phased through the wall and entered a small chamber — revealing that it was a sarcophagus , and her visible , decomposing corpse was inside of it . The Duel on Stygeon Prime . The Inquisitor entered the cell once Jarrus and Bridger saw the corpse , igniting his lightsaber and explaining that Unduli had died long ago but that her bones continued to help the Empire in killing the remaining Jedi . Bridger attempted to contact the others , but the Imperial forces in the prison were jamming their communications . With no reinforcements available , Jarrus attacked the Inquisitor and the two engaged in lightsaber combat . The Inquisitor proved to be a superior opponent , quickly gaining the upper - hand over the former Padawan , and was able to deduce that Jarrus was trained by Jedi Master Depa Billaba based on his fighting style ; the Inquisitor explained that he had studied the records of the Jedi Temple , where he learned that Billaba was a master of Form III , the lightsaber combat style that Jarrus heavily favored . The duel continued within the cell until Bridger set off one of Wren ' s " miracles " to blow open the door . Jarrus and Bridger fled from the cell , though the Inquisitor followed close behind . Meanwhile , at the turbolift , Wren realized that the Imperial forces were jamming their signal and that the entire mission was a trap , forcing her and Orrelios to begin thinking of a new escape plan . Jarrus and the Inquisitor continued their duel in the detention area , where the Inquisitor attempted to use his superior combat skills to convince Bridger that he should turn to the dark side of the Force . Bridger , who had never heard of the dark side before , instead attempted to attack the Inquisitor with his energy slingshot , but the Inquisitor used the Force to push him down the cell block . Back in the lift , Wren and Orrelios sent an empty elevator to the upper levels , tricking the stormtroopers waiting for them into believing that the rebels were returning . The stormtroopers opened fire into the empty lift before realizing there was no one there , at which point they entered the elevator . When they did , one of the detonators exploded , taking out the lift and the stormtroopers . Wren disabled the other lifts into the detonation area , which would buy the rebels some time but would also force them to find a new escape route . The Inquisitor , attempting to taunt his opponents , encouraged Jarrus to surrender for Bridger ' s sake . Jarrus refused , and the Inquisitor threw him down the cell block with the Force . The Inquisitor tried once more to turn Bridger , but the boy refused and the Inquisitor lashed out towards him . As the Jedi hunter prepared to strike the Padawan down , Jarrus used the Force to pin the Inquisitor to the ceiling , giving Bridger an opportunity to escape . The Inquisitor landed back on the floor once Jarrus let go of his telepathic hold and , as the rebels began to flee , the hunter ignited a setting on his double - bladed lightsaber that allowed it to spin on a disc , adding an additional element of danger to the fight . Once he did so , the rebels fled , making their way through the halls of the prison before they met up with Wren and Orrelios . As they made their escape , the Inquisitor followed the rebels throughout the prison . Wren told Jarrus that their new exit was the landing platform , which they had previously rejected , but it became their only option . As the Inquisitor pursued the rebels , he ordered a full lockdown of the prison , causing the doors within the halls to begin closing . The rebels were able to evade him , and Orrelios held one of the doors open long enough for the rebels to slip through , trapping the Inquisitor on the other side . The Inquisitor used his lightsaber to begin slicing through the door while the rebels entered the interior of the landing pad , closing another door behind them and shooting the controls to prevent the Inquisitor from opening it from a console . Wren attempted to open the main landing bay door but was unable to , prompting Bridger to try and pick the lock , though it caused an electrical surge that shocked him and prevented him from opening the door . At Jarrus ' command , he and Bridger used the Force together in order to lift the landing bay door . The door was successfully opened , revealing numerous stormtroopers on the other side . The stormtroopers immediately began firing , and Orrelios threw one final " miracle , " which exploded and eliminated a number of the Imperial soldiers . The rebels made their way onto the landing platform and fought the stormtroopers there , as Wren contacted Syndulla to alert her that they were ready to be picked up . The " Phantom " quickly arrived , along with a " fleet " of tibidees who attacked the firing stormtroopers . The rebels ran towards the " Phantom " as the Inquisitor broke through the doors . As the rebels were nearly at the shuttle , the Inquisitor threw his lightsaber towards them , which Jarrus deflected with his own . The rebels finally boarded the " Phantom " and flew away from the prison , having successfully escaped despite their mission to rescue Master Unduli being a failure . Aftermath . After the mission was over , HoloNet News sent out a broadcast stating that Master Unduli had been killed by the rebels while traveling to testify before the Imperial Senate . The transmission was interrupted , however , with another transmission from Gall Trayvis , who claimed to urge Imperial citizens not to believe the Empire ' s version of events and to keep Unduli ' s memory alive . The " Phantom " , meanwhile , left Stygeon Prime and reunited with the " Ghost " , which soon returned to and landed on Lothal . Once on Lothal , Jarrus explained that he did not want to abandon Bridger as a student , but simply doubted his own abilities to teach the boy . Nonetheless , they both agreed to be less doubtful of their training together in the future . Sometime later , Bridger infiltrated the Academy for Young Imperials on Lothal in order to discover the location of a large Imperial kyber crystal of great power , which the rebels wanted to destroy . He was able to locate the information , but also learned that the Inquisitor was taking students who were deemed to be Force - sensitive ; the students were later known only to have disappeared from the Academy . He and one of the Force - sensitive students , Jai Kell , were able to escape , and the Inquisitor recognized Bridger — who had been posing as a cadet — as the Padawan he encountered on Stygeon Prime , and questioned another cadet , Zare Leonis , about what he knew of the rebels . The rebels encountered the Inquisitor again on the fifteenth anniversary of the rise of the Empire , and he confronted Jarrus and Bridger on Fort Anaxes , where Bridger tapped into the dark side to help them escape . As a result of these encounters and the danger posed by the Inquisitor , the Jedi hunter became a source of fear for Bridger , who saw him as someone who could kill his friends and leave him abandoned and alone again , just as he had been as an orphan on Lothal . In order to take the next step in his Jedi training , Bridger had to overcome that fear . Once he did , he was able to acquire a kyber crystal and build his own lightsaber . The rebels also later learned that Trayvis was an Imperial agent . He sent out another message claiming he wanted to meet the rebels at the Lothal City Capitol Building on Lothal , but the meeting was a trap set by Agent Kallus . The rebels were able to escape , and Trayvis — his cover having been blown — appeared on HoloNet News denouncing the so - called violence of the rebels . Behind the scenes . The mission to rescue Luminara Unduli was the main plot of " Rise of the Old Masters , " the third episode of the first season of the animated television series " Star Wars Rebels " . The mission , which was first revealed in the reference book " " by Adam Bray , was also adapted into the chapter book " Droids in Distress " by Michael Kogge and " The Inquisitor ' s Trap " by Meredith L . Rusu . The mission allowed the creative team to make use of the Spire on - screen ; the prison had originally been created for an arc in the animated television series " " , but the episodes were never completed as a result of the show ' s cancellation . The episodes were adapted into the comic book series " " , in which the Spire appeared in the first issue , but the mission in " Rise of the Old Masters " was its first on - screen appearance . Some concept art for the mission , including the " Phantom " attached to the side of the prison , was submitted on October 10 , 2013 . Dave Filoni , executive producer of " Star Wars Rebels " , explained that the mission was a way to tell a story about what happened to some of the Jedi who did not die in the initial execution of Order 66 . It also allowed the show , which is heavily influenced by the original trilogy , to offer a connection to the prequel trilogy and to " The Clone Wars " ; the team picked Luminara Unduli as the Jedi the rebels wanted to rescue because she was known to the audience of " The Clone Wars " . By using an established character for the mission , the show was , according to Filoni , able to show what the Empire destroyed and how " it destroyed a lot of these characters " that audiences knew .