Kas ' im Kas ' im was a male Twi ' lek and Dark Lord of the Sith who lived during the New Sith Wars . Bought from slavery by the Sith Lord Na ' daz , Kas ' im became his chosen apprentice before he could walk , and spent the following years training in the Sith arts . His master taught him in the ways of all seven forms of lightsaber combat , and eventually , Kas ' im killed his master in a duel . Shortly after Lord Kaan founded the Brotherhood of Darkness , he invited Kas ' im to join with him , outlining his plan for victory against the Jedi Order . Kas ' im agreed , and for much of the war he served as the Sith Blademaster on Korriban , teaching the Brotherhood ' s students the art of lightsaber combat . When the Human apprentice Bane lost in a practice duel to Sirak , a Zabrak apprentice , Bane appealed to the Blademaster to train him privately in combat so that he could become skilled enough to beat Sirak and take his revenge . However , the Headmaster of the Academy , Qordis , had ordered the other Masters at the school to cease Bane ' s preferential treatment when Bane began to pull away from the dark side after killing of the student Fohargh in an earlier duel . Knowing that Bane had considerable potential in the dark side , Kas ' im chose to defy the orders of Qordis and taught Bane in secret . However , Bane eventually left the Academy and the Brotherhood after a conflict with Qordis . Kas ' im traveled to Ruusan with many of his students , after a summoning from the Brotherhood ' s " de facto " leader , Kaan . Kaan had called them all to participate in what he believed would be the final battle against the forces of the Jedi Order and their Army of Light , led by the Jedi Master Lord Hoth . The guerrilla tactics Hoth employed irritated the Brotherhood ' s forces — Kas ' im particularly . No longer believing the Blademaster could control his bloodlust so close to battle , Kaan sent Kas ' im to try and sway Bane back to the Brotherhood , or kill him . The Blademaster then traveled to Lehon under Kaan ' s instruction , where he found the former student Bane . After an intense confrontation in which Bane bluntly refused to rejoin the Brotherhood , the pair fought a vicious duel that resulted in the death of Kas ' im . Biography . Early life . Kas ' im was born into slavery on Nal Hutta . At a very young age he was separated from his parents when he was purchased from the auction blocks by another Twi ' lek named Na ' daz . Na ' daz was a Sith Lord and had felt the presence of the Force within Kas ' im , even though the child was so young he could barely walk . Master Na ' daz took him to Ryloth , where the Twi ' lek child became his apprentice , and began his training . Kas ' im never saw his parents again , and held no memories of them in his later life . Na ' daz was a highly skilled lightsaber duelist , a trait he imbued in Kas ' im , teaching him to wield the double - bladed lightsaber . Eventually , Kas ' im became stronger in the dark side than his master , and also more skilled in lightsaber combat . When he had learned all he could from Na ' daz , Kas ' im engaged him in a duel , killing him and taking his curved - hilt lightsaber as a prize . The Brotherhood of Darkness . When Lord Kaan founded his Brotherhood of Darkness , he appealed to the surviving Dark Lords to join him , including Kas ' im . The Twi ' lek embraced Kaan ' s vision for the Sith , believing his promise of equality as Dark Lords would quell the in - fighting that had repeatedly dwindled the numbers of their order through the course of history . Kas ' im ' s training under Na ' daz had made him a firm believer in strength of arms , and he felt that with the Brotherhood ' s new approach they would crush the Jedi through superior numbers . He then joined the many Sith that followed Kaan ' s leadership . Because of Kas ' im ' s unmatched dueling skill , Kaan appointed him Blademaster in the Sith Academy on Korriban , the training center for all the apprentices deemed strong enough in the Force to become Dark Lords . The Twi ' lek undertook the task of training every apprentice with the lightsaber , instructing them in sequences from all seven forms of lightsaber combat . The Blademaster would analyze their basic style , and assign each student a key form from which to learn the techniques . The students were each given training sabers to practice their lightsaber techniques . The blades were covered in millions of barbs made from the spines of the pelko bug , a deadly venomous insect native to Korriban . Each of these barbs could cut through cloth and secreted venom when they struck an opponent , resulting in burns , blistering and paralysis for the victim . When struck , a student would feel extreme pain and the limb affected by the poison would be useless , simulating the loss of that limb from a lightsaber strike . These practice blades allowed the apprentices to challenge each other in non - fatal combat , while Kas ' im would observe the duelists . When one apprentice was defeated , Kas ' im would point out places for improvement for both victor and vanquished , and inform the observing students of noteworthy points to learn from the duel . Ever cautious of the way he had defeated his own master , Kas ' im trained all the students in the use of one - bladed lightsabers , save Sirak , who used a double - bladed variant of the training saber . Sirak was the Academy ' s strongest student . He was rumored to have been the apprentice of Qordis , the Headmaster of the Academy , for nearly twenty years , long before the Brotherhood began , although this was never proved , and why he utilized a double - bladed saber while all others did not was as much of a mystery to the students . Nonetheless , Kas ' im continued to train Sirak in the double - bladed saber . The Blademaster was satisfied he could defeat any of the students by switching to a style they would have been unfamiliar to — such as the variant of Form IV that utilized a lightsaber in each hand — should his trainees turn on him at any point in the future . He was relentless in his teaching , training in the students to fight in all weathers , often in heavy rain . When the apprentice Bane arrived at the academy , Kas ' im immediately recognized his strength in the Force . Kopecz , the Dark Lord who had first sensed Bane ' s potential , told the Blademaster to watch Bane closely , and offer him any assistance he required . Although Kas ' im realized this was because Kopecz knew any progress Bane made would reflect well on him as Bane ' s discoverer , he watched Bane with interest as he quickly improved his skill , before witnessing him challenge the Makurth apprentice , Fohargh . Bane was constantly kept on the defensive from Fohargh ' s use of Makashi strikes , while he employed Dun Möch to humiliate Bane further . Bane became enraged and thrust out with the Force , repelling his opponent mid - leap . He then proceeded to throttle the Makurth with the Force , until he died . Kas ' im , fascinated with Bane ' s performance , made note of how he overcame his enemy . Bane ' s private tutelage . Feeling that Bane had reached a new height for his powers , Kas ' im was disappointed when Bane began to regress , seemingly terrified of the power he had unleashed . He consulted Qordis , who told him to abandon Bane ' s tutelage for more worthy students . Kas ' im knew it was really Qordis ' disregard for Kopecz that prompted his decision , but the Blademaster thought that Bane had lost his strength and will to fight . Bane , sensing this lack of favor , challenged Sirak in a bid to regain his standing . The Zabrak used a swift offensive , alternating the form he used or blending several lightsaber styles at once , toying with his outmatched opponent before breaking several of Bane ' s bones , hurling him across the dueling ring with the Force , and knocking him unconscious . Bane ' s rapid and abrupt defeat only confirmed Qordis ' views to Kas ' im . When he recovered from the numerous injuries Sirak had inflicted , Bane sought out the Blademaster , and pleaded for Kas ' im to resume his training . The Twi ' lek was highly skeptical of Bane ' s intentions , but used the excuse of Qordis ' orders to initially refuse the plea . Bane appealed to his pride , saying that Kaan would know it was Kas ' im , not the other Sith Masters , who would receive credit for Bane ' s abilities since the other masters had abandoned him as a lost cause . He expressed his unwavering desire for revenge against Sirak , and eventually , Kas ' im agreed . The Blademaster trained Bane in secret , dueling each other , practicing new forms , techniques and sequences . Bane learned every move of the double - bladed saber , focusing on memorizing every parry and thrust . Eventually , Bane challenged Sirak , in which he outclassed the Zabrak , humiliating him . However , Kas ' im called Bane to a stop before he delivered the killing blow , knowing the Brotherhood would need a fighter as skilled as Sirak in the war . As a testament to Bane ' s skill and a gesture of his pride in the apprentice , Kas ' im later bestowed Na ' daz ' s lightsaber upon the apprentice . When Qordis manipulated Bane into leaving the Academy , Kas ' im was infuriated , feeling the Academy needed a powerful apprentice for the other students to aspire to . The Headmaster told Kas ' im that Bane had gone to Korriban ' s Valley of the Dark Lords to seek the knowledge of the ancient Sith . Despite Qordis ' dismissal of the apprentice , Kas ' im was sure Bane would survive . While Kas ' im ' s student was in the wilderness of Korriban , Kaan contacted Qordis , telling him to bring all apprentices to Ruusan . There they were to participate in what he hoped would be the final battle of the New Sith Wars , overwhelming the last remnants of the Army of Light — a militant force of thousands of Jedi from across the galaxy . Led by Jedi Lord Hoth , the Army of Light had been established by the Jedi Order in response to the growing threat of the Kaan ' s Sith Brotherhood . When Bane returned , he was lured into the Academy ' s library by Githany , a former Jedi who had secretly trained Bane to use the Force when the masters abandoned him , and attacked by Sirak . Though bent on revenge , the Zabrak was no match for Bane , who killed him . He then accused Qordis of sending Sirak as an assassin before publicly rebuking the Dark Lord . Declaring himself Darth Bane — Kaan had abolished the title to emphasize equality in the Brotherhood — Bane stole Qordis ' ship , the " Valcyn " , leaving the Academy and the Brotherhood , despite Kas ' im ' s attempt to convince him to meet with Kaan and see what the Blademaster believed was the truth of the Brotherhood founder ' s words . All the apprentices were deemed Dark Lords — no longer students but equals in the Brotherhood of Darkness — and despite Bane ' s departure , Kas ' im traveled with them to Ruusan . He quickly became infuriated by the " hit and run " tactics the Jedi commander Lord Hoth had adopted , hiding in the forests of the planet . While far from the war , Kas ' im had been content to train the apprentices . But on the very front of the war , his warrior nature and hunter ' s instincts began to dominate Kas ' im ' s drives — training and sparring with the other Sith did not satisfy his need to be in real life - or - death combat . Kaan began to fear that the agitation Kas ' im was feeling could spread , causing a rebellion within the Sith and the Brotherhood would dissolve through the in - fighting that would ensue . Githany , Bane ' s former secret teacher alongside Kas ' im , had a premonition through the Force that Bane would return and eradicate the Brotherhood . When she informed Kaan of this , the Brotherhood ' s leader decided to clear two of his problems by sending the Blademaster to Lehon , charged with convincing Bane to return or removing him as a threat to the Brotherhood . The final duel . Kas ' im flew to Lehon in a Sith Buzzard , where he picked up the homing beacon of the " Valcyn " and landed alongside it . He found the trail through the forest left by the rancor Bane had controlled with the Force to take him to a Rakatan Temple where Bane had discovered the holocron of Darth Revan . Following the trail , Kas ' im sensed the rancor ' s approach , and engaged it in battle , slicing and cutting gashes in the rancor ' s flesh until it eventually succumbed to the numerous wounds and collapsed before dying . Pleased that his fighting skills remained sharp , Kas ' im proceeded to the Temple . There , the Blademaster found his former student , and issued Bane an ultimatum — to join Kaan in defeating the Jedi or be killed . By this point Bane held no respect for Kaan or the Brotherhood , believing his own Rule of Two — a new philosophy stating that there should only ever be two Sith , one master and one apprentice — would restore the Sith to glory through secrecy , cunning , and betrayal . Bane listened to Kas ' im describing the " Old Ways " of the Sith having failed and a new doctrine being needed — the Human was tempted into trying to sway his former teacher into becoming his new apprentice , but when Kas ' im announced the Brotherhood was the new philosophy , he knew the Blademaster would not join him . Kas ' im initiated a duel , hoping to beat him with a fast offensive . Bane , however , defended himself and counter - attacked , forcing his former teacher back into the Temple of the Ancients and into a dead end . Kas ' im leapt into a side chamber to avoid the dead end , but there was no escape from the room itself . When Bane paused in the doorway to savor his victory , Kas ' im disconnected his double - bladed lightsaber into two single sabers , and utilized Ataru against his unsuspecting opponent . Unable to defend against the unfamiliar style , Bane was forced back to the Temple entrance . At that moment , Bane thrust out with a huge shockwave of dark side energy to obliterate Kas ' im , but the Blademaster shielded himself with the Force . Nevertheless , the power Bane unleashed shook the entire Temple , smashing the archway surrounding Kas ' im and crushing him beneath the stone . Legacy . Kas ' im had trained Darth Bane , the apprentice who would eradicate the Brotherhood of Darkness and remodel the Sith under the Rule of Two . Kas ' im ' s most poignant legacy was this apprentice , whom he had taught to be a formidable duelist . Kas ' im also left a lasting impression on Bane when he revealed he killed his own master once he could learn no more from him . Bane embraced this for his New Order , feeling it represented the transition of power from a strong being to an even stronger one . It was stated that Bane would have attempted to sway Kas ' im into becoming the first apprentice in the New Order , had he not sided with Lord Kaan . Personality and traits . Kas ' im had spent his life training as a duelist and warrior . As such , he possessed a hunter ' s instincts . He greatly anticipated battle , becoming eager at the prospect of joining the war on Ruusan , and growing agitated when the enemy would not stand and fight , as Kaan saw when Hoth employed guerrilla tactics . His willingness to fight was felt by Kaan to be unquenchable unless facing real opponents — practice sparring with others did little to slake his bloodlust , such was his desire to feel real challenges to his skill . Despite these instincts , Kas ' im was highly disciplined and knew his place in the Brotherhood , being satisfied to train new apprentices for most of the New Sith Wars . He believed in Kaan and his Brotherhood of Darkness , feeling its strength of arms would defeat the Jedi Order . He was convinced in the " united " structure of the Brotherhood , but recognized the necessity of leaders within the Academy , saying it " avoided complications " if the other masters on Korriban deferred to Qordis , who in turn responded to Kaan . Kas ' im had a certain streak of pride ; the apprentice Bane would appeal to this when seeking to be trained privately . He had no time for the weak or broken , a trait highlighted by his Sith and warrior nature . He was cunning and wary in his tutelage of lightsaber combat ; he trained most students to wield single blades , and occasionally double blades like the one he usually utilized , but always kept various techniques known only to himself , such as his mastery of the dual - wielding variant of Form IV . Kas ' im also sported several tattoos across his chest . Powers and abilities . Kas ' im ' s strongest skill was his swordsmanship with the lightsaber . It was this trait that earned him the position of Blademaster at the Korriban Academy . He preferred the double - bladed lightsaber not out of versatility , which he himself stated the weapon lacked , but because of the unfamiliar nature it possessed against an opponent . In addition to these skills , Kas ' im was a lethal practitioner of the dual - blade variant of Form IV , a skill he kept secret and discouraged his students from delving into . After years of study , Kas ' im mastered all seven forms of lightsaber combat . He then honed his skills for decades , perfecting every move and sequence . Kas ' im ' s proficiency with the lightsaber was such that he was considered amongst the Sith to be the greatest swordsman in the galaxy , and possibly the greatest ever to have lived . His lightsaber was a unique construction like all lightsabers , but had a certain distinction — it could be disconnected in the center , changing a formal double - bladed lightsaber into a pair of single blades for Jar ' Kai . As well as being a skilled duelist , Kas ' im was strong in the Force and could use various Force powers . He was able to shield himself using the Force , a technique he taught all his students to protect them from being disarmed by telekinesis . Kas ' im could also use telekinesis himself , employing it to execute jumps while dueling . Behind the scenes . Kas ' im was created by Drew Karpyshyn for the novel " " and was killed off by the leading protagonist .