Confrontation in the Caverns of the Hidden One A confrontation took place in 43 . 5 ABY between Jedi Grand Master Luke Skywalker and Koro Ziil , leader of the Hidden Ones , a secret sect of the Force - based organization Baran Do tasked with preserving their knowledge . The duel took place in the Hidden Ones ' home , the Caverns of the Hidden One . Skywalker — who had recently been exiled from Coruscant for failing to prevent Jedi Knight – turned – Sith Lord Jacen Solo ' s fall to the dark side of the Force — and his son , Jedi Knight Ben Skywalker , had traveled to the Kel Dor homeworld of Dorin , where they hoped to speak with Ziil to find out more about Solo ' s fall . After a short time training with the Baran Do Sages on the surface , they discovered the existence of the Hidden Ones . The Baran Do allowed the Skywalkers to go to the Caverns of the Hidden One , where they were allowed to speak with Ziil , who had become known as " The Hidden One . " However , in order to protect the Hidden Ones ' secrecy , Ziil told the Skywalkers that they could never leave the caverns . Luke believed that the Hidden Ones had inadvertently turned their backs on the Force , and to prove that they were weakening , Luke suggested that Ben duel Chara , the Hidden Ones ' newest member and best fighter . Ben defeated Chara , despite the Kel Dor by far being his superior . The Hidden Ones began to believe Luke ' s theory , greatly angering Ziil . The Hidden One attacked Luke , and they dueled with the Force , with Luke emerging the victor . The Hidden Ones then returned to the Baran Do on the surface . Prelude . In 43 . 5 ABY , Jedi Grand Master Luke Skywalker and his son , Jedi Knight Ben Skywalker , traveled to the planet Dorin after Luke ' s trial and exile from the Jedi Order and the galactic capital of Coruscant for failing to prevent Jedi Knight Jacen Solo ' s fall to the dark side of the Force and subsequent reign of terror as Sith Lord Darth Caedus . They hoped to talk with Koro Ziil , the Master of the Baran Do Order , who had briefly trained Solo during his travels after the Yuuzhan Vong War , in order to find out the cause of Solo ' s descent to the dark side . The Skywalkers met with the Baran Do Sages , the Kel Dor Force - based organization , only to learn that Ziil had recently died . Since they could not speak with Ziil , they decided to stay in Dor ' shan and train with the Sages for a short time . A few days after the Skywalkers ' arrival , one of the Sages — senior combat instructor and former apprentice of Ziil , Charsae Saal — decided that it was time to die . According to the Baran Do culture , when one decided that it was time to die , they simply gave themselves over to the Force . Luke and Ben attended Saal ' s funeral , along with the other Baran Do Sages . Luke , however , was not convinced that Saal had indeed died ; he believed that Saal had hidden his presence in the Force and then gone through a trap door or some other quick and easy exit . He later scouted the area with Ben , and they found that the platform upon which Saal had " died " in fact concealed a door leading to an underground chamber . There , the Skywalkers found Saal very much alive , along with current Mistress of the Order , Tila Mong , and two other Sages . The Skywalkers confronted them and were allowed to accompany Saal in rolling carts that led them down a long passage to the system of caverns that were home to the Hidden Ones , a secret sect of the Baran Do dedicated to preserving the Order ' s knowledge . Once there , Saal took the name of " Chara , " and he told the Skywalkers that in order to protect their secrecy , they could never leave and must change their names . However , Saal also revealed to them that Ziil had also joined the Hidden Ones and had become their leader , and was now known as " The Hidden One . " Luke and Ben met with Ziil and talked to him about Solo , but Ziil did not have much information on why the former Jedi became a Dark Lord of the Sith . During their talk , Luke and Ben found Ziil to be paranoid and corrupt , and they discovered that he was filling the Hidden Ones with lies . The Skywalkers were told to begin excavating caves , where they would live and spend the rest of their lives . A few days after the Skywalkers ' arrival , the female Kel Dor Ithia — formerly the best fighter in the Baran Do Order — dueled with Chara in a set of three matches . Chara defeated her each time , a feat he had never accomplished before . Luke began to believe that , in accepting their death and turning their backs on life , energy , and the will to fight and survive , the Hidden Ones had turned their backs on the Force . Luke decided to prove to them that every minute they stayed down in the caverns , accepting their " deaths , " their power was weakening . The confrontation . Demonstrating the theory . Luke gathered all of the Hidden Ones into Koro Ziil ' s throne chamber by spreading the word that he and Ben were finally going to adopt new names . Luke , however , had no intention of doing so . Instead , he explained his theory to the Hidden Ones and went on to suggest that Ben — who was barely a Jedi Knight — should duel Chara , the Hidden Ones ' best fighter and newest addition . If Ben lost , Luke promised that he would accept their fate and stay in the caverns . Ziil allowed Chara to accept the challenge , and both combatants were armed with only hardwood staffs . Chara immediately took control , landing the first blow on Ben ' s ankle . Ben recovered quickly , but as the duel progressed , Chara clearly had the upper hand , slamming Ben into a pillar with the Force and hitting Ben ' s ankle again , causing the young Jedi to limp . Ben , however , managed to hit Chara ' s head , and the elder combatant began to lose the will to fight . After the two traded a series of glancing blows , a kick from Ben connected solidly with Chara ' s chest , knocking him down . Now having the advantage , Ben intentionally allowed Chara to disarm him ; surprised , Chara was knocked off - balance , and Ben capitalized on the error with a series of punches . Finally , an attempt by Chara to attack with his staff again was met with an open - hand strike from Ben that split the weapon into two pieces ; the follow - through landed squarely on Chara ' s chin , and the defeated Kel Dor fell to the ground , unable to get up immediately . Seeing the light . Chara and other Hidden Ones began to believe that Luke was right ; they were growing weaker , not stronger . Ziil , however , refused to accept the revelation . He became angry at the Skywalkers as well as with the other Hidden Ones who began to speak out in agreement with the Jedi . When his former apprentice , Chara , admitted that he believed that the Skywalkers could be right , Ziil said the Skywalkers were too dangerous to remain living among them . Ithia and a very old Kel Dor named Burra spoke out against his statement , but the Hidden One revealed that he had already told those on the surface that the Skywalkers had died when a cave collapsed , and that sending any more oxygen - nitrogen canisters would not be necessary . Without the canisters , the Skywalkers would die within the next day or two from the helium - rich atmosphere of Dorin that only the native Kel Dor could breathe . Several of the Hidden Ones pleaded with Ziil to change his mind , but he refused . The Hidden Ones continued to protest , and Ithia told Ziil that the Hidden Ones — which she referred to as the " experiment " — had failed . Ziil ordered the assembly to be quiet and obey , but Ithia refused , and the Hidden One was finally pushed over the edge . Master vs . Master . Ziil declared that because their influence among the Hidden Ones was too great , the Skywalkers could not be allowed to remain in the caverns even for the short time before their deaths . He then stepped forward and blasted Luke with white Force lightning . Luke absorbed the attack with his lightsaber , but the strength of the lightning threw him backward into a pillar . Still managing to deflect the lightning , Luke got up and began moving slowly toward Ziil . Ziil created a Force whirlwind , but it was not enough to stop Luke ' s advance . Many of the other Hidden Ones fled from the throne chamber , as Ben directed them out a blast door . Ziil broke off the lightning and increased the power behind the whirlwind , sending it straight at Luke . Luke deflected it off to the side , and it slammed into a pillar . Deactivating his lightsaber , Luke started forward again . The whirlwind began moving around the room until it paused directly behind Luke , and it hammered continuously at a pillar until the pillar broke and toppled down toward Luke . Luke caught the pillar in midair and redirected it , dropping it down to the ground . Ziil then picked up his throne with the Force and hurled it at Luke . To counter the blow , Luke threw the fallen pillar toward Ziil with the Force . They collided in midair ; the throne shattered , and the pillar fell to the floor . Luke rolled the pillar forward with the Force , forcing Ziil to jump over it . Luke charged forward and kicked the unprepared Hidden One in the stomach , sending him flying . Ziil tried to get up , but he could not stay on his feet and collapsed to the ground . Aftermath . Even after his defeat , Ziil tried to enforce his rules . He stated that he would tell those on the surface that his earlier message about the Skywalkers ' deaths was a mistake , and he promised to free his servants and appoint a board of advisors , and in a couple of years they would reassess the situation . However , the Hidden Ones had turned against him . When Ziil still refused to listen to reason , Ben set off a secret explosive that collapsed what Ziil had claimed to be the only exit from the caverns . Ben continued to reveal all of Ziil ' s lies to the Hidden Ones ; Ziil , however , still refused to admit to the existence of another way out of the caverns . At last Burra gave in , revealing he knew of a secret turbolift chamber that led to the surface . The Hidden Ones left the caverns , returning to the Baran Do on the surface , and the Skywalkers left Dorin soon after . Behind the scenes . The showdown was chosen by " Star Wars " author Aaron Allston to be the final event of his first " " novel , " " , released in March 2009 .