Thon Thon was a secretive and often reclusive male Tchuukthai Jedi Master who lived in the period surrounding the events of the Great Sith War . He kept the details concerning his race , homeworld , and origins a closely guarded secret , and possessed extensive knowledge of the Force even in as - yet - unknown techniques . Soon after first visiting the Jedi library world of Ossus , Thon became a Jedi Master , and went in search of a planet where he could live and study in solitude and peace . The Force guided him to Ambria , a planet in the Stenness Node that was plagued by the dark side . After containing the Sith influence to a single spot , Thon settled down and began to take Jedi apprentices , among them Oss Wilum and the future head of the Jedi Order , Nomi Sunrider . Splitting his time between life on Ambria and communion with the other Jedi Masters on Ossus , Thon often took an advisory role , yet found himself immersed in such events as the Battle of Deneba during the Krath Holy Crusade . Due to his high - profile pupils and his high esteem within the Order , Thon became directly involved in the Great Sith War . Escaping a plot by Dark Lord of the Sith Exar Kun to have the Jedi Masters murdered by their former wards , Thon left Ambria and took a more active role in the conflict . He assisted in the evacuation of Ossus before the planet was devastated by a supernova unleashed by the Sith , and was present at Yavin 4 when Exar Kun made his final stand and was defeated , ending the war . Thon was one of the few Jedi Masters to survive the conflict . A decade after the events of the war , Thon attended the Conclave on Exis Station , where his former apprentice , Nomi Sunrider , discussed the future of the Jedi Order . Biography . Early life . Thon ' s early life was shrouded in mystery . He was a member of the Tchuukthai , a beast - like quadrupedal alien species native to a planet deep in the Unknown Regions , the location of which was kept a closely guarded secret . The Tchuukthai were extremely secretive and reclusive , so information about them and their homeworld was unreliable , at least in Thon ' s time . The few Tchuukthai who left their homeworld were considered little more than savage beasts by most members of galactic society , until their true intellect was discovered by a Jedi Master , whose name was eventually lost to time . The Jedi befriended Thon on the Tchuukthai ' s planet , and taught him much about the galaxy . Thon was intrigued at the wonders of the greater galaxy , and eventually the Jedi Master offered to teach his friend in the ways of the light side of the Force . Thon was cautious and unsure about leaving his planet initially ; he was afraid that if his species ' intelligence was known , they would be ruthlessly exploited by the criminals of the galaxy . However , the Jedi Master agreed to keep the Tchuukthai ' s intelligence a secret , and trained Thon in the ways of the Force . Thon eventually became a powerful Jedi , and became skilled in a great many Force powers as well as the art of lightsaber combat . Jedi Master . Some time later , Thon arrived on the Jedi world of Ossus , fully trained in the ways of the Force . He gave no indication of where he came from and how he had learned his powers , and so he was of great interest to the Jedi Masters . Virtually no information was known on his species ; the Republic Bureau of Xenology had named them the " Wharl " because of the complete lack of information and name on the Tchuukthai . The Bureau sent many inquiries to Thon about his species , though they eventually gave up after Thon continually ignored them . He was a master of every power known to the Jedi , and even taught the other Masters several powers unknown to them at the time . Thon ' s response to any questions about his origin was always the same : " It is better that you do not know — at least , not yet . " The other Jedi accepted this explanation , though it heightened their interest in the reclusive Jedi Master . Thon eventually became one of the most advanced and revered Jedi Masters of the time , alongside such others as Odan - Urr , Vodo - Siosk Baas , Ood Bnar , and Arca Jeth . Some time during his stay on Ossus , Thon inherited the Jedi holocron , of which Ood Bnar , an ancient Jedi Master who had lived for centuries , was gatekeeper . Bnar was extremely knowledgeable in the history of the Sith and the dark side of the Force , and through the centuries he provided the Jedi Order with the information they needed to fend off these theats . He created a holocron , which was passed down through the generations until it came into the possession of Master Arca , who lent it to Thon . Thon stayed on Ossus for several years before departing the Jedi planet to search of somewhere more remote to train his students in peace . Thon wore no clothes , and carried only a single item — an ancient lightsaber — as he wandered across the galaxy in his ship , guided only by the Force . One day a place outside the reaches of his ship ' s sensors , surrounded by dark side energies , caught Thon ' s attention . For some time , Thon meditated on its presence as the Force guided his ship to the location of the energies . He eventually arrived in the Stenness system , and traveled to the planet Ambria . Ambria . Thon quickly realized that Ambria radiated the dark side , and sought to find the source . A mineral - rich world once busy with miners , Ambria had never been properly colonized because of its barren , inhospitable landscape . After much of its natural resources had been exhausted , the planet became the home of a Sith sorceress , who , although her name was eventually forgotten , was recorded in the archives of the Jedi Order on Ossus . Using her Sith powers , she constructed a great obelisk infused with the dark side where , once completed , she attempted to conduct an ancient Sith ritual . However , it proved too complex for her to pull off correctly , and she inadvertently released a wave of dark side energy ; this eradicated the few sentients living on the planet , further damaged the atmosphere , and tainted the planet with dark side energies . The planet then became a focal point for Sith during the fall of the Sith Empire , who eventually passed away , leaving malevolent spirits behind on Ambria . These energies and spirits remained on the planet for many centuries , until they eventually guided Thon to Ambria . Thon landed on the surface of the barren planet and was immediately ambushed by the Sith spirits , which he easily repelled with his superior knowledge of the Force . After much time and effort , though , Thon became thoroughly exhausted , and his ability to repel the attackers was diminishing . However , he had devised a strategy to defeat the Sith , and swam out into the middle of Lake Natth , the largest source of water on the planet . When he reached the center of the lake , Thon gave in to the dark side , and the Sith energies swarmed around his limp body . He then cunningly used his remaining energy to use the Force to trap his adversaries in a web of light side energy , before leaving the lake forever . The spirits were furious at being trapped under the waters of the lake , and possessed and mutated the local life forms , forming dark side monsters called hssiss . With the exception of the lake , Ambria was finally cleansed of the dark side . Beginning of the recovery . During his wandering on the planet , Thon discovered a meditative canyon located in the Tiernvael Mountains in the northern region of the planet . This area was even more barren than the majority of the rest of the planet , with barely any precipitation and no wildlife . This was largely due to its proximity to the Sith obelisk built by the long - dead Sorceress , though unorthodox weather patterns also affected it . Although the area did enjoy brief times of total calmness , vicious sandstorms usually meant that travel was almost impossible . During one such storm , Thon sought shelter in the canyon , and found that one wall in particular had an unusually powerful connection to the Force . He entered a meditative trance so that he could recover from the injuries he had suffered during the brutal storm , and found that the wall made him feel at ease , unaware of the turmoil around him . He also noticed an array of transparent crystals , which , although they made no impact in the Force , could be used as something to focus on while meditating . The storm eventually subsided , and although Thon left , he made a note of the location of the canyon . He returned there for many years , whenever he was in need of spiritual solace . Thon built a small training center not far from Lake Natth , and had several breeds of animals transported to Ambria from various worlds throughout the galaxy , in an attempt to bring about the recovery of the desolate world . For over a dozen years , Thon trained several students on Ambria , including a young Vultan named Oss Wilum . Wilum had previously been a student of Jedi Master Garnoo , but when the Neti Master perished , Wilum was left without a tutor . Thon , however , on one of his rare excursions offworld , realized Wilum ' s Force potential , and brought him to Ambria to complete the Vultan ' s training . After five years of learning , Wilum had finally completed his apprenticeship , and had surpassed Thon ' s expectations . The Tchuukthai was surprised at how quickly his apprentice had progressed , considering how late in life he had begun his training . Thon knew that Wilum was ready to join the ranks of the Jedi Knights , and knew that Arca Jeth would be looking for more Jedi to aid him on the planet Onderon , where the Naddist cult was in revolt . He also made arrangements with another Jedi Master , known as Chamma , to have a young Human named Andur Sunrider sent to Ambria to further his training under the Tchuukthai . The training of Nomi Sunrider . Arrival of a new apprentice . Sunrider had learned all that Chamma felt he could teach him , so the ancient Jedi decided to send him to Thon in the Stenness system . Andur was due to arrive on the planet in his ship , the " Lightside Explorer " , along with his wife Nomi , his baby daughter Vima , and their droid , A - 3DO . However , en route to Thon ' s compound , the trio had been ambushed by thugs sent by the local crime lord , Bogga the Hutt , to intercept them and steal Andur ' s Adegan crystal s , which were to be given to Thon as Master Chamma ' s thanks for training Andur . During the ambush , Andur had been killed , forcing his wife Nomi to retaliate and slay the assassins with her late husband ' s lightsaber . After his death , Andur had appeared as a Force ghost to Nomi and urged her to take the gift of crystals to Thon , and telling her that the old Tchuukthai Master would help her decide where to go next . Nomi honored her husband ' s word , and continued on towards Thon ' s home . Oss Wilum had yet to depart for Onderon , so he accompanied Thon to meet Nomi , whom they saw standing on a hill overlooking the Tchuukthai ' s house . Thon brought Oss toward Nomi , and she originally mistook the Vultan Padawan as the Jedi Master , believing Thon to be a simple beast . Thon did not correct this misinterpretation , keeping silent and acting as if he was indeed an unintelligent animal . Thon and his apprentice led the young woman to the house , providing food for her and her child . As Sunrider began to recount her ordeal , they were soon interrupted when Bogga and his cronies arrived on his sail barge . The Hutt , who had always held a great hatred for Thon , was determined to steal Nomi ' s extremely valuable Adegan crystals . Thon watched as Wilum attempted to engage the Hutt ' s men in combat , though the young Jedi could not match their numbers , and was soon captured . Thon then acted , leaping at the men , and using the Force to knock them back . Bogga knew they were unable to match such power and ordered a retreat , though he still did not give up his hopes of acquiring the crystals . It was then that Nomi finally learned that the beast was Thon , and it was he who would be teaching her the ways of the Force . Sunrider ' s training begins . For the next few months , Thon did not speak a word to his new pupil , allowing her to recover from the grief of Andur ' s unfortunate death , and to decide the form her life would now take . Nomi , began to doubt Thon , and spent much time pondering his peculiar teaching methods . While Thon was away , Nomi unknowingly used the Force to protect her daughter Vima from the hssiss who populated Lake Natth . In truth , Nomi was using basic battle meditation , though she did not know at the time . Although the hssiss had been defeated , the malevolent spirits in the lake reached out to Nomi and told her she was going to die . Nomi fled the lake , though she still had lingering doubts about Thon , and asked herself why she was on this savage world . When Nomi returned , Thon finally fully realized her potential , and he knew she would one day become a great Jedi Master . Thon also knew of the great conflicts that would take place in the galaxy , and the role Nomi would play in them — it was then that he decided to begin her training . Oss Wilum had yet to depart for Onderon , and Thon met with one of Arca ' s apprentices , the Twi ' lek Tott Doneeta , who had recently arrived on Ambria to request assistance from the Tchuukthai Master . With Thon ' s permission , Wilum accompanied Doneeta back to Master Arca on Onderon , finally leaving Thon alone with Nomi Sunrider to begin her training . He told his new apprentice that she would use her Adegan crystals to build a lightsaber , though Sunrider was reluctant to ever use such a weapon again ; she had only killed with Andur ' s saber hesitantly , and was disinclined to do so again . Thon explained that her previous experience with the weapon had been in self - defense , and that she had already shown great skill with the blade . The red - haired Human persisted , noting that Thon did not use a lightsaber , and that she would only accept his tutelage on the condition that she did not have to use a lightsaber . Thon agreed , though he knew she would waver eventually . Thon decided to take Sunrider to the Meditative Canyon , where her training would begin . He told her that it was not enough for a Jedi simply to know the light ; they had to feel the tension between light and dark , both in themselves and in the wider universe . The dark side challenged them , he told her ; it made them reach beyond themselves , like when Nomi rescued her child that day . They stopped at Lake Natth , though Nomi wanted to move elsewhere , worried for her child ' s safety . Thon obliged , and took Nomi and Vima to the edge of the great canyon , which he meditated in regularly . Thon then showed Sunrider his Jedi Holocron , the gatekeeper of which was the ancient Neti Jedi Master Ood Bnar . The tree - like man from Myrkr told them of those who had joined the dark side , and that a mighty conflict between the Jedi and the worshipers of the dark side would happen within Nomi ' s lifetime . As he pointed at the young apprentice and told her that she would play a pivotal role in the war , Vima became scared , and Thon deactivated the holocron . He told Nomi to take his lightsaber , which he used during his Jedi training . Nomi was frightened by what Bnar ' s holocron had said , and wanted to leave the planet and start a new life with her daughter Vima . Thon , however , knew what she was thinking , and told her that there was no going back for Nomi Sunrider — there was only going forward , or into darkness . Stonebone ' s attack . Meanwhile , Bogga was still determined to acquire the Adegan crystals , and to rid " his " system of Thon , who had proved a thorn in his side one too many times . A local pirate named Finhead Stonebone had incurred Bogga ' s wrath after raiding an Ithullan ore hauler . The Hutt ordered him to kill Thon as restitution or he would himself be executed . When Stonebone refused , knowing such an attempt on a Jedi Master ' s life would equal suicide , Bogga had his first mate killed by the Hutt ' s pet hssiss , forcing Stonebone to reconsider . Thon and Nomi were traveling back to the training compound when Stonebone and his motley crew , aided by an entourage of Bogga ' s rough enforcers led by the gangster Gudb , arrived on Ambria in armored skiff s and firing rockets at the building . While Thon was able to use the Force to steer the cannon rounds away from their target , he told Nomi to take up the lightsaber that they might fight the pirates together . Nomi , however , was adamant that she would never touch the weapon again , and apologized to Thon for letting him down . The salvos soon managed to break through Thon ' s defenses , forcing the Jedi Master to charge the hovering skiffs , terrifying Nomi . Thon attempted to persuade her to use her battle meditation if she would not take hold of her weapon , though she once again refused , telling him that " he " was the Jedi Master , and that she had to rush Vima to safety . Thon permitted her to , though , claiming that if his apprentice had no power then neither did he — he gave himself up to Stonebone ' s gang , allowing them to fit him with Mandalorian manacles and to lead him toward their skiffs . Using the Force , Thon telepathically urged Sunrider to use her battle meditation , though she did not want to acknowledge its existence . Finhead Stonebone ' s men then prepared to lift Thon onto the skiffs . The pirates entered Thon ' s compound where they searched for the Adegan crystals , while Nomi contemplated the loss of yet another Jedi . Soon , one of Bogga ' s enforcers , who had been sent by the Hutt to work in conjunction with Stonebone ' s crew , found the crystals in Thon ' s hut . This caused a rift in the ranks of the group of alien criminals , and a massive fight ensued over who would get to present the valuable crystals to Great Bogga . The gangsters ' thoughts were being influenced by Nomi , who had chosen by this time to employ her battle meditation . While the thugs fought each other , Nomi took hold of the lightsaber , and finally accepted that she had to use it . She freed Thon and charged at the raiders , aided by the great Tchuukthai Master , who sent bursts of powerful concentrated Force energy at them . Finally , through the efforts of Thon and his apprentice , Bogga ' s men were defeated , and Stonebone retreated from Ambria . Nomi Sunrider had finally accepted her fate as a Jedi , and Thon began to teach her everything he knew . Naddist Uprising . After a time , in which Thon had taught his young apprentice all that he could , the ancient Tchuukthai opted to bring Nomi to Ossus to further her training under the Krevaaki Jedi Master Vodo - Siosk Baas , who would begin by teaching Nomi to build her own lightsaber using the Adegan crystals Chamma had intended to be given to Thon . Nomi instantly took a liking to the Jedi training world , noting how peaceful and tranquil the place was . Thon took Nomi and Vima to Master Vodo , who was also training the young Jedi Knights Dace Diath , Shoaneb Culu , and Qrrrl Toq in the art of lightsaber construction . Upon meeting her , Vodo , like Thon and Ood Bnar before him , noted Nomi ' s strength in the Force , and said that he knew she could become a great Jedi . Thon stayed with Nomi on Ossus during the several months she trained under Vodo , though she was soon ready to depart with the other young Jedi Knights . Prior to Sunrider ' s mission to Onderon , Thon brought her with him to the galactic capital of Coruscant to meet with the Republic Ministry of Defense . Speaking in his native Tchuukthese , Thon had his apprentice translate for him a request that the members of the Galactic Senate provide assistance for the Jedi who were beleaguered on Onderon . Thon reminded the senators that the Jedi had fought on the side of the Republic for generations , and that the favor should be returned when necessary . When the senators began to grumble in hesitation , Thon reminded them that if and when the Naddists conquered Onderon , their dark power would sweep across the expanse of the galaxy soon after . This final proclamation swayed the Defense Ministry to commission the full strength of the Republic Navy to join the Jedi in battle . Like Thon ' s previous student Oss Wilum , Nomi was to travel to Onderon to aid Arca with the Freedon Nadd Uprising . When Nomi departed , Thon returned to Ambria , alone once again . The Krath conflict . In 3997 BBY , Thon found himself leaving Ambria once again when as the leaders of the Jedi had called a great convocation of the Order to discuss threat of the Sith - inspired Krath , formed by members of Empress Teta ' s aristocracy in the wake of the Naddist Uprising . The Krath sorcerers had recently carried out a series of attacks against the Republic , and their growing dark - side menace demanded the attention of all the Jedi . The meeting commenced on the planet Deneba under the leadership of Master Odan - Urr himself and Thon ' s former apprentice found herself in the spotlight , for she and Ulic Qel - Droma had led Republic forces in battle against the Krath . The Order was unaware that the Krath were preparing to strike again ; agents of the dark side had reprogrammed the servant droids used by the Jedi Masters to attack their owners on command , and a vessel packed with combat droids was en route to Deneba . As the debate over what action to take concerning the Krath carried on , the Krath themselves pressed the attack . War droids descended upon the assembly just as the Jedi ' s own droids turned on them . The Jedi fought valiantly , employing Arca Jeth ' s technique of disabling the automatons ' internal mechanisms using the Force . The Jedi prevailed in the end , but at great cost of life — Master Arca himself was killed before the battle was won . Following the debacle , Thon returned with many of the remaining Jedi Masters to Ossus as their students set out to address the Krath issue . Ulic Qel - Droma went to the Krath — against the advice of several Masters , including Thon — on a mission to try and infiltrate their ranks that he might end their reign of terror from within . After months without word from the undercover Jedi , Nomi Sunrider herself — along with Cay Qel - Droma and Tott Doneeta — went to the Krath capital of Cinnagar in order to try and make contact with Ulic . Her mission did not meet with success , however , as she found that Ulic had himself joined the Krath , going so far as to capture Nomi and even to order her death . After narrowly escaping Cinnagar , the three Jedi returned to Ossus to propose another plan . Thon shared his doubts concerning Qel - Droma , stating that perhaps the young Knight was beyond their help ; he had made a choice of his own , and may likely even learn the error of his ways without their help . Nevertheless , Thon insisted that they leave Ulic free to decide his own path , consenting to allow his former student to lead another attempt to extract her friend . The plan failed , however , as Ulic Qel - Droma once more chose to remain with the Krath , becoming one of the new Dark Lords of the Sith soon thereafter along with Exar Kun , a former pupil of Vodo - Siosk Baas ' . The Great Sith War . Thon returned to Ambria and remained there as the war with the Sith began to escalate . Attacks were made on the Republic and the Jedi by the Krath , who were led by Qel - Droma himself , their forces augmented by the armies of Mandalore the Indomitable . Nomi Sunrider accompanied Vodo - Siosk Baas and a group of other Jedi in an attempt to persuade the Republic Senate to let the Jedi handle these matters , but it was too late ; the Krath attacked Coruscant itself , with Ulic Qel - Droma at their head . The Jedi and the Republic were victorious when Qel - Droma was betrayed and abandoned by his lieutenant and lover , the Tetan sorceress Aleema Keto , in an effort to take control of the Krath from him . The traitor himself was captured due to his underlings ' treachery , and was slated to stand before the Senatorial Inquisition . Meanwhile , Exar Kun was recruiting more young Jedi to his cause , which he misrepresented as a new Jedi Order , its teachings supplemented by knowledge that the Jedi Masters , he alleged , had kept from their students — Sith knowledge . After killing Master Odan - Urr in order to procure a Sith holocron which the Jedi historian had been keeping safe , he used the item as " proof " of the hidden knowledge ; knowledge he promised would bring about a new golden age for the Jedi . Among the young Jedi Knights to accompany Kun from Ossus to his base on Yavin 4 was Thon ' s former apprentice , Oss Wilum . Although Wilum himself had more doubts than the rest concerning Kun ' s knowledge and intentions , the new Dark Lord of the Sith used dark side magic to enthrall the group , possessing them with Sith spirits . Ulic Qel - Droma stood trial before the Senate , and Nomi Sunrider , along with Ulic ' s brother Cay and the Cathar Jedi Sylvar , attended . The proceedings went horribly wrong as Qel - Droma , instead of answering for his crimes , spoke out against the Republic and the Jedi . Exar Kun himself came to rescue Ulic from the tribunal , murdering the Supreme Chancellor of the Republic and slaying Master Vodo in the process . Nomi Sunrider , dejected , decided to visit Thon on Ambria in order to get away from the war . Sylvar accompanied her . Betrayal . Another of Thon ' s former students was planning to visit his master : Oss Wilum , now the unwitting servant of Exar Kun . Accompanied by Crado , the mate of Sylvar and another of Kun ' s minions , Oss was sent to Ambria to kill Thon , in a wider plot by Kun to kill off the Jedi Masters of the Order . As Nomi Sunrider , her daughter Vima , and Sylvar were arriving at the home of Thon , Oss Wilum and Crado were at Lake Natth , preparing to kill the Master . The pair summoned the monstrous hssiss from the lake using Sith magic , and started off in the direction of their objective . Sensing the disturbance , the three Jedi rushed to head off the attack . Nomi and Sylvar lashed out at the hssiss with their lightsabers — but Thon threw himself at the beasts , tearing at them with tooth and claw . The hssiss were all but defeated once Sunrider employed her talents with battle meditation to distract them that Thon might finish them off . Sylvar and Thon quickly turned their attention to Oss Wilum , knocking him down and freeing him from his Sith - induced trance . After a short confrontation in which Sylvar condemned her mate for his actions , Crado fled , and the three Jedi helped an injured Wilum into the house . Thon managed to bring his fallen pupil back to the light , though the Tchuukthai Master never fully recovered from the pain of betrayal . He feared for the other Masters , only to discover later that his fears had come to fruition : the minions of Kun had succeeded in killing all of their Masters , and only Thon had escaped their doom . The cost of war . Thon and the three Jedi — along with little Vima — returned to Ossus to meet with the Order concerning the growing crisis . As Thon and Nomi Sunrider discussed the fall of Ulic Qel - Droma and the murders of the Jedi Masters with a number of other Jedi , Tott Doneeta rushed in with news : the Sith were attacking once again . The space station known as Kemplex IX , which was located in the Cron Cluster of the Auril sector , was under siege by a Sith vessel of ancient origins . Thon recommended caution ; the station itself was not an important military target , and he suspected that the Sith were staging a feint . As Ossus was both nearby and of much more import , it would be a more desirable target , and so the Jedi decided to split their forces . Jedi Shadow s Dace Diath , Qrrrl Toq , and Shoaneb Culu volunteered to lead a fleet to counterattack at Kemplex , while Thon and the rest of the Jedi remained on Ossus to safeguard the library world . The attack did indeed turn out to be a false move on the part of the Sith , but not as the Jedi had suspected . The ancient Sith battleship , commanded by Crado and Aleema Keto , drew the Jedi and Republic forces out , leading them on a chase into the Cron Cluster . There , Aleema used Sith magic to rip out the core of one of the cluster ' s stars , destroying the Jedi fleet . The reaction went out of control , causing an implosion of the core and subsequent supernova , killing Crado and Aleema and unleashing a massive stellar shockwave . Ossus was in the path of the explosion , and had very little time left before the devastation reached it . As the shockwave bore down on the planet , the Jedi rushed to evacuate all living beings — and as many precious records and artifacts as possible . As the remaining inhabitants of Ossus made their hurried choices of what to take or leave , Thon and his companions grew devastated at the planet ' s impending doom . As they headed for their transports , Cay Qel - Droma felt a presence above : Ulic was arriving on the planet , along with Sith and Mandalorian forces that Exar Kun had brought to plunder Ossus before it could be destroyed . Cay flew off in the " Nebulon Ranger " to meet his brother . Exar Kun landed and immediately headed for the libraries , where he could take as much valuable Jedi information as possible . He entered a chamber where Ood Bnar was working to place artifacts and scrolls in a shielded vault before leaving , and the two did battle . As Kun ' s Sith Massassi warriors came to their master ' s aid , Bnar saw that he could not fight them off , and so he forced himself into his species ' metamorphosis , turning himself into a stout tree in order to prevent Exar Kun from taking the relics . However , he rendered himself immobile in the process , joining his fate to that of the planet . As the evacuation continued , Thon noticed the attackers ' ships in the air . Among them was the vessel of Ulic Qel - Droma , as well as the " Nebulon Ranger " , being flown by Cay ; the ships were falling from the sky . Tott Doneeta and Nomi Sunrider raced off to aid them , leaving Vima in Thon ' s care . Arriving at the crash site , Nomi marked a grim scene : Ulic had just killed his own brother . That Qel - Droma might never again do harm with the dark side , Nomi used a little - known ability to cut Qel - Droma off from the Force completely . Thon , Vima , and Oss Wilum soon arrived , and discovered all that had transpired . The Tchuukthai Master told everyone to get to their ships , and then went off on a final errand on Ossus — he had to say goodbye to Ood Bnar . Thon came upon Bnar in tree - form atop the shielded vault , and expressed his sadness for Ood ' s sacrifice . Bnar reassured him that he had accomplished his goal , and that he might not even die in the upcoming cataclysm . The two said their goodbyes , and Thon returned to his ship , leaving Ossus behind forever . The shockwave arrived soon thereafter , utterly devastating the planet . In the only chance he had to at least partially redeem himself for his actions , Ulic Qel - Droma led a Jedi and Republic fleet to Exar Kun ' s home base on Yavin 4 . Thon accompanied the fleet in his personal transport . Knowing that he could no longer defeat the forces arrayed against him without his allies , Kun employed Sith magic to secure another escape . Drawing upon the life - force of the entire Massassi race on the moon , he freed his spirit from his physical body , giving himself a form of immortality . Realizing that he was still a threat without corporeal form , Nomi Sunrider used the Force to bind Kun ' s spirit to the planet , that he might not escape into the greater galaxy . The Sith War was over , and the Jedi had won , but not without paying dearly for their victory . Conclave of Exis Station . Following the events of the Great Sith War , the Republic — and the Jedi along with it — slowly recovered . Nomi Sunrider , Thon ' s former apprentice , grew in renown , and was named head of the Jedi Order . A decade after the end of the war , it was decided that a conclave would be held on Exis Station in the Teedio system , as the Order had not met in substantial numbers since the great convocation on Deneba during the Krath crisis . Arriving on the station , Thon was delighted to see Vima Sunrider , now a young teenager , who had accompanied her mother to the conference . He was also greeted by Sylvar , who had grown more bitter in the years since the war despite her hero status , but nonetheless Thon was happy to see her as well . The conclave began , led by Nomi Sunrider , who spoke of the horrors of the war — and the healing that had taken place since . As his dear friend and former student spoke , Thon noted that she had become a great Jedi , and that the rest of the Order held her in high esteem . The speech was cut short , however , as Nomi , Sylvar , and Thon felt a disturbance in the Force . It was Vima ; she was in danger . The teenage girl , bored with the conclave and frustrated with her mother ' s neglect of her Jedi instruction , had slipped away and stolen one of the ion mining ships in the station ' s hangars . She had soon lost control of the vessel as it became caught in one of the nearby star ' s magnetic loops . The assembled Jedi were all but helpless as Vima punched out of her vehicle before it could careen into the star . She was not out of danger , however ; the miners ' foreman refused to risk more ships retrieving her escape pod before it , too , might fall into the inferno . Vima was rescued when the escape pod was grappled by the ship of Tott Doneeta , who was late arriving to the conclave . With Vima safe and back on the station , the meeting continued . Sylvar spoke next , of Ulic Qel - Droma . The former Sith Lord had been living in self - imposed exile since the Sith War , though he was technically a war criminal . Cut off from the Force , he wandered from planet to planet , trying to find somewhere to live out his days in solitude . Sylvar did not agree with this , blaming Qel - Droma for the atrocities of the war , and wished that the man no longer be allowed to walk free , but rather that he be punished for his crimes . On this note , the convocation ended . Sylvar went with Tott Doneeta to Ryloth , while Thon remained on Exis Station with Nomi Sunrider . Yet once again , Vima was nowhere to be found . The girl had stowed away aboard a ship and traveled to the frozen planet Rhen Var , where Ulic Qel - Droma was living in seclusion . Having less negative memories than her contemporaries about the man , she hoped to convince Ulic to train her in the Jedi arts . After a thorough search of Exis Station , Thon informed Nomi that her daughter was nowhere to be found , and was not likely on the station at all . Nomi resolved to find her daughter and traveled to Rhen Var alone , but not before the girl had received a substantial amount of training from Qel - Droma . Sylvar , however , was also on the planet , having come with the spacer Hoggon , who had brought first Ulic and then Vima to Rhen Var . As Nomi spoke with her daughter , Sylvar confronted Qel - Droma , and the two fought . In the end , though Sylvar would not kill Qel - Droma when he was unarmed and unwilling to fight back , the fallen Jedi was killed by a blaster bolt fired by Hoggon , who wished to earn a place in history for himself . The three Jedi left Rhen Var , and Nomi Sunrider took Vima as her apprentice to finish the girl ' s training . Legacy . Thon ' s name , and the legends it was attached to , continued to be well known for thousands of years . He appeared in the stories of Ulic Qel - Droma and Nomi Sunrider that were contained in the Tedryn holocron and delineated by Bodo Baas , a descendant of Thon ' s contemporary , Vodo - Siosk Baas . The Master ' s Force talents were recounted by Beldorion , a Hutt Jedi who admired his abilities . Tionne Solusar , a Jedi historian who lived thousands of years after the Sith War , composed a ballad celebrating Thon ' s most famous apprentice . Solusar , having dedicated her life to the study of legendary Jedi , was well - versed in knowledge concerning the people Thon knew in his lifetime . Thon ' s work on Ambria eventually came to fruition , and over several centuries the barren planet began to recover . The dark side spirits contained in Lake Natth , however , would plague the planet for evermore . In later eras , the meditative canyon discovered by Thon became a haven for Jedi seeking refuge , and during Palpatine ' s Great Jedi Purge s , many Jedi used the canyon as a hideout . Personality and traits . Though he was famous as a Jedi Master and trained many students , Thon lived simply while on Ambria , maintaining a humble dwelling near Lake Natth . During the training of Oss Wilum , the two Jedi cared for a herd of the staga native to the planet . Although Thon possessed a lightsaber , which was his only possession when he arrived on Ambria , and even a set of Jedi robes , he was not known to travel with such trappings of the Jedi for much of his life , which he spent in seclusion with his students . The Tchuukthai typically spoke in short bursts , often inserting phrases from his native language . However , he could speak at length on subjects of import . and Thon was also known to be quite eloquent on occasion . He often expressed himself and taught lessons in a profound manner ; when Nomi Sunrider first arrived on Ossus , Thon pretended to be a simple beast under the care of Wilum , and after she learned his identity , he did not speak to her for months , allowing her to grieve her husband ' s death . However , Thon could be a warm and caring creature as well . He was often involved in the upbringing , care , and initial Jedi training of Vima Sunrider when she was a child , and even wished that she would give him a hug when they were reunited on Exis Station . Conversely , if the situation demanded it of him , he took a hard line . When attempts to rescue Ulic Qel - Droma from the Krath and turn him back to the light were discussed , Thon was opposed to the idea , stating that perhaps Qel - Droma should learn from his mistakes without the aid of the Jedi . Thon was not as dispassionate as Jedi of later eras ; when his friend and colleague Ood Bnar essentially sacrificed himself to protect Jedi knowledge from Exar Kun , Thon made sure to visit him before leaving Ossus , showing sadness as well as respect for the Neti Master ' s decision . Powers and abilities . As a Tchuukthai , Thon possessed considerable natural means of defending himself . He was large and well - muscled , and more than capable of carrying adult humanoids on his back . A bony frill around his neckline , armor plating on his back , hornlike projections from his jaws , and spikes protruding from his shoulders helped to protect him from harm . Each of Thon ' s four legs ended in a set of sharp , strong claws , ideal for slashing . Additionally , the Tchuukthai had strong jaws filled with long , sharp teeth , which he used to considerable effect on the hssiss of Lake Natth . When he first came before the Jedi Masters on Ossus , Thon already had extensive knowledge of Force techniques , including some that the Masters themselves did not yet know of . By the time Nomi Sunrider came under his tutelage , Thon was possessed of a myriad of Force powers . He was capable of telepathic communication , as he showed after he allowed himself to be captured , when he used the Force to tell Nomi to use battle meditation . The Tchuukthai was himself capable of battle meditation , but Vodo - Siosk Baas stated that Thon was not as talented in it as Arca Jeth . Furthermore , Thon brought Nomi Sunrider to Ossus to refine her talents in battle meditation with Odan - Urr , who possessed greater knowledge of the technique than he . Thon was a Jedi Weapon Master , and although he was capable of wielding a lightsaber , when it came time for Nomi to build her own weapon , he brought her before Vodo - Siosk Baas for instruction in the matter . Upon arriving on Ambria , the Jedi Master at first had little difficulty in defeating the dark side spirits that lurked there , and when he grew weary , he cunningly " played possum " in order to lure them in . He then used his considerable abilities in directing light - side energy to contain the Sith apparitions fully . Furthermore , when Bogga the Hutt ' s thugs attacked Nomi and Oss Wilum , Thon was able to use massive waves of Force energy to knock them down . Later , as Finhead Stonebone and his gang attacked Thon ' s home from their skiffs , the Master deflected their salvos with a wall of Force energy . The Tchuukthai was later said to have possessed the ability to use the Force to create light itself . Millennia after their deaths , both Thon and Nomi continued to be classed as among the most powerful Jedi Masters of all time ; indeed , the Hutt Jedi Beldorion seemed to believe that the pair , along with Grand Master Yoda , to have had unparalleled skill in the light side of the Force . Behind the scenes . The character of Thon was created by writer Tom Veitch , and was first mentioned in the endnotes of the comic book series " Dark Empire " . Thon was first depicted in " " . He continued to appear in subsequent issues throughout the rest of the " " series , where his character was further developed by Veitch as well as Kevin J . Anderson . Author Drew Karpyshyn mentions Thon in conjunction with Ambria in the third novel of his " Darth Bane trilogy " , titled " " . Thon is mentioned directly only in one novel set in the New Republic era , but Nomi Sunrider and " her Master " are referred to in several others . Thon receives a brief mention in the video game " " , where the player can attain a Jedi robe which supposedly belonged to the Tchuukthai master .