Sev ' rance Tann Sev ' rance Tann was a Chiss female who left Chiss Space to become a Dark Acolyte and general in the Separatist Droid Army during the Clone Wars . Hailing from Csilla in the Unknown Regions , she became one of few Chiss to leave her people during her time , along with her lover Vandalor , both becoming agents of Count Dooku and the Confederacy of Independent Systems shortly before the outbreak of the Clone Wars in 22 BBY . Dooku taught Tann the use of the dark side of the Force , and she became one of his most trusted underlings . When the war broke out , Tann fought at Geonosis and later commandeered the Kaer Orbital Platform for Separatist use . When Dooku learned of the new Republic technology known as the Decimator , Tann was ordered to locate the weapons and steal them for the CIS to use . After winning battles on Tatooine , Eredenn , and Alaris Prime , Tann stole the Decimators from the Republic and prepared them for Separatist use . She then launched an ambitious attack on Sarapin , on Dooku ' s orders , capturing one of the most heavily fortified planets in the galaxy and leaving many Core Worlds in darkness as a result , having destroyed the planet ' s geothermal generators . Tann was then sent to oversee Decimator construction on Krant , but was pursued by Jedi Master Echuu Shen - Jon , whose Padawan Tann had killed at Geonosis . After Shen - Jon destroyed the Decimator - producing foundries , Tann kidnapped his new Padawan , Naat Reath , and fled . Later , in a final confrontation in a CIS stronghold in the heart of the Krantian forest , Shen - Jon killed Tann . Although Tann had been a successful commander , her service in the Clone Wars lasted just a standard month . Biography . Early life . Sev ' rance Tann was a Chiss female born on the planet Csilla during the waning days of the Galactic Republic . She was one of very few Force - sensitive Chiss on record , with an uncanny ability to predict her enemy ' s movements . Tann attended the Chiss Academy , studying military strategy and tactics ; the academy ' s professors often set their students assignments , and on one occasion , one of Tann ' s professors tasked her with training a group of primitive Yresilini into a cohesive , organized army . The Yresilini were said to be untrainable creatures , but Tann was determined to triumph in her assignment . She started by choosing one of the creatures to be her " general , " and teaching him a number of simple commands . Her general and his comrades laughed at her efforts ; in response , Tann had him executed on the spot , with his would - be troops present , and appointed a second general , running him through the same rudimentary commands . He was far more co - operative than the first , and he and his troops followed her orders implicitly . Tann ' s teachers were impressed , and she was accorded high marks for the assignment . Tann became a talented military tactician , with a large repertoire of strategic and tactical knowledge and an innovative mind , which some believed was furthered by her ability to use the Force . Tann eventually became one of few Chiss to leave Chiss Space , along with her lover , Vandalor , brought to Republic space by Darth Sidious , Dark Lord of the Sith . Historians of a later era speculated that Thrawn , an officer in the Chiss Expansionary Defense Force who was in contact with Sidious , had alerted the Dark Lord to Tann and Vandalor ' s existence . Historians were unsure whether it was an attempt to remove Tann from a dangerous situation on Csilla or merely to provide Sidious with a tactician he could have confidence in . Tann became a Dark Acolyte of Count Dooku , Sidious ' Sith apprentice , studying the dark side of the Force under him and learning how to wield a lightsaber . She quickly won the trust of her master and several other prominent Separatist leaders with many successes in missions , becoming the leader of Dooku ' s Dark Acolytes . The war begins . Tann had joined Dooku during a period known as the Separatist Crisis , and the count was preparing to wage war on the Republic . In 22 BBY , he contacted Tann , informing her that he was " en route " to the planet Geonosis in the Outer Rim Territories to secure the support of the final constituents of the Confederacy . However , Dooku had foreseen a battle taking place on the planet , and wanted to take the necessary precautions ; he ordered Tann to travel to Geonosis and be ready to secure his escape should Dooku need to flee the impending battle . As the count had predicted , a battle did occur , with the Jedi and their newly formed Grand Army of the Republic clashing with Dooku ' s droid armies , beginning the Clone Wars . Dooku fled the initial battleground , the Geonosians ' Petranaki arena , and was making his way to his swoop bike , which would take him to his ship , located in a hangar some distance away from the arena . To reach his swoop , Dooku had to travel through a narrow valley , wherein skirmishes were taking place between small groups of CIS and Republic forces . Tann , along with a number of B2 super battle droids , made her way through the canyon , leading her forces and defeating the few pockets of clone troopers present . As she went , Tann ordered the remaining CIS forces which had been fighting to join her group . Resistance was light , consisting mostly of clone troopers and several Clone Personal Walker s , which Tann and her droids were able to dispatch with ease . Tann eventually came upon a number of CIS OG - 9 homing spider droids defending themselves against Republic All Terrain Tactical Enforcers , but again these posed no problems to Tann and her burgeoning forces , and she also slew a Jedi Padawan . Eventually , with the valley entirely cleared of any Republic threats , Dooku passed through , congratulating Tann on her success . However , the count had been pursued by a number of Jedi , including Plo Koon , Ki - Adi - Mundi , Echuu Shen - Jon , and Shen - Jon ' s Padawan , Stam Reath . Dooku fled , and all the Jedi bar Reath went to try and intercept him ; the young Reath approached Tann , demanding that she drop her weapon . Amused , Tann stabbed Reath with her lightsaber , mocking his master and escaping before the Jedi could attack her . Dooku , too , was able to flee Geonosis , returning to Coruscant , and he contacted Tann , informing her that the CIS needed to strike back at the Republic quickly , and that he had a special task for her . Dooku wanted Tann to oversee the Geonosian production of a new army for her to take command of and strike at the Republic with . He chose the Kaer Orbital Platform in the Outer Rim as the base of operations for the army ' s construction ; an old InterGalactic Banking Clan manufacturing plant which had long since been abandoned , it contained many large stockpiles of raw resources which had been abandoned by the Banking Clan after interference from the Hutt Cartel . It also housed a number of deactivated production centers which Dooku ordered Tann to capture . The Chiss general would remain at Kaer until she and her Geonosian workers had amassed a formidable army . Tann established a temporary base there , hoping to finish her task as quickly as possible ; time was of the essence , as it was only a matter of time until the Republic discovered her presence there and tried to purge her . After capturing the abandoned production centers , the Geonosians built a large force of dwarf spider droids and homing spider droids . However , Dooku contacted Tann to inform her that the Jedi had learned of her presence on the orbital platform , and Tann ' s scouts discovered a Republic base on the station , as well as a grounded " Acclamator " - class assault ship . The Republic forces were led by Jedi General Jor Drakas , and Tann opted not to fight , but to take her fresh army and leave the station immediately . She departed , and was again congratulated by Dooku for her success ; he was ready to move into the next phase of his plan . Secret project . Tann was sent to the remote world of Tatooine in the Outer Rim along with her newly retrofitted army . Boorka the Hutt , a powerful member of the Hutt Cartel that controlled the world , reportedly had top - secret information about a Republic project in development , and Dooku wanted to get his hands on the info as quickly as he could . Boorka was willing to sell to the highest bidder , and Tann was charged with persuading him to deal with the CIS . Time was short , so Dooku cleared her to meet any of Boorka ' s demands in exchange for the information — they would not necessarily honor their agreements . As Tann set down on Tatooine with her droids , Dooku contacted her with a last piece of advice , informing the Chiss general that Hutts were impervious to Jedi mind tricks and that she should tread lightly when dealing with them . Tann and her forces had to travel from their landing site to Boorka ' s palace near Mos Osnoe , and as they went she was forced to cut down a number of Boorka ' s henchmen , who were attacking . They finally reached the Hutt ' s palace , and he was impressed with her for having succeeded against the soldiers . He informed Tann that the Republic — wanting to get in on the lucrative Outer Rim trading in order to help fund the Clone Wars — had built a heavily - fortified spaceport just outside of Mos Osnoe , which disrupted his own criminal activities . Boorka agreed to hand over all the information he possessed about the Republic project if Tann and her forces destroyed the spaceport . Knowing that the spaceport was well - defended , Tann opted to build a temporary base on Tatooine ; she ordered a detachment of droids to raid a local camp of Jawa scavengers and steal a number of droids that could help them build the camp . Her battle droids did as instructed , destroying the Jawas ' sandcrawler and retrieving numerous droids which helped them construct a base camp . After preparing her forces , Tann launched an attack on the Republic trading outpost and spaceport . The Republic defended it with clone troopers , Jedi , and even a number of locals in an attempt to repel Tann ' s attack , but she proved too strong for them , and was able to destroy the spaceport in what was her first real taste of combat under Dooku . Boorka was delighted , and , as agreed , provided her with the information , which she sent straight to Dooku . The Republic were developing a type of weapon , known simply as Decimators , at a secret testing facility on remote , inhospitable Eredenn Prime . Because the planet was so far from any potential Republic reinforcements , Dooku sent Tann and her forces there immediately to investigate further . She was ordered to scour the planet and capture any Decimators , ensuring none were destroyed — Dooku wanted to keep alive the possibility of the CIS using them against the Republic — and discover where they were being manufactured before being transferred for testing at Eredenn . Tann ' s scouts soon located the first small Decimator construction facility , capturing it but ensuring no damage came to the Decimators themselves . The Separatist analysts present were unable to decipher the operational codes , so the Decimators were unusable . Tann contacted Dooku to inform him of this ; he told her to carry on with her mission as before , and that the codes could likely be found by hacking into the databases of the Republic ' s control centers . Tann located the second Decimator site , before finally finding the third , larger base , wherein the control center was located , in the mountains to the north . Tann penetrated the Republic ' s meager defenses and ultimately captured the base . They found a protocol droid , in whose memory banks the Decimators ' operational codes were stored , but they were heavily encrypted and Tann ' s analysts could not make use of them . However , they did learn from the droid that the Decimators were being manufactured by the Wookiees on their colony world , Alaris Prime . Tann had the droid and the Decimators put onto her transports , and she departed for Alaris Prime . Into the Core Worlds . Tann took the droid and the captured Decimators with her to Alaris Prime , along with a small force of battle droids . They set down on a small island in a lake , which was surrounded by five Wookiee colonies , though did so stealthily enough not to be noticed . The Wookiees had established a long range communication tower , defended by clone troopers , which could transmit messages across long distances ; Tann was advised to disable it , so as to ensure no Republic reinforcements would arrive . Her forces destroyed the communication tower , and scouts later discovered the Decimator facilities , guarded by Republic forces , to the east . After the Republic ' s defenses were terminated , Tann escorted the droid to the facility , where the Separatists were able to decrypt the codes contained within the droid ' s memory . The ability to unlock the Decimators now in her power , she had the construction facilities destroyed , and departed Alaris Prime . With his new weapon , Dooku was ready to attack the Republic where they least expected it . Dooku ' s target was the volcanic , inhospitable world of Sarapin , located in the Core Worlds . Sarapin generated enough geothermal energy to provide the Core Worlds with 80 % of their power , making it an important Republic planet . Protected by a fortified defensive grid and a strong shield , whose energy was relayed from the system ' s asteroid field , it was one of the most heavily defended planets in the galaxy , and attacking it was an ambitious move for Dooku . Tann assembled an elite task force , consisting of many Confederacy Cruiser s , strong ships that could help the Separatist forces navigate the asteroid fields , Geonosian " Nantex " - class starfighters , and transports laden with ground troops and Geonosian construction workers , as well as Tann ' s personal starfighter . Tann was ordered to destroy the power relay on Asteroid 426 , which would collapse Sarapin ' s shield and leave it vulnerable to further attacks . The asteroid was heavily guarded , though ; the surrounding , smaller asteroids were littered with heavy turrets , and there were Republic ground forces — consisting of clone infantry , Jedi , and vehicles — as well as starfighters posted on Asteroid 426 , guarding the power relay . However , there was also a supply depot containing enough resources for Tann and her task force to construct a base on the asteroid . Tann ' s task force made it to Asteroid 426 , destroying or avoiding all the turrets in their path . Her droids destroyed the Republic supply depots on the near side of the asteroid , allowing the Geonosian workers to harvest the stockpiled resources stored there by the Republic . Tann had a base constructed , building up her forces and defending the base from occasional strikes by small groups of Republic forces , sent from the other side of the asteroid , where the power relay was located . Eventually , when she deemed her forces sufficient to overwhelm the Republic presence on the asteroid , Tann launched an attack at the power relay , though unlike in previous campaigns , she did not lead from the front with the infantry , opting to pilot her starfighter instead . The CIS triumphed over the Republic in the battle , destroying the power relay and taking with it Sarapin ' s shields , leaving the vital world ripe for attack . Dooku contacted Tann , congratulating her on her success , and ordering to her to gain a foothold on Sarapin , using as much force as she could bring to bear . Tann brought all the forces at her disposal to Sarapin ' s surface , including the stolen Decimators . However , while the planet was relatively undefended and there for the taking , its volatile nature threatened to make Tann ' s efforts all the more arduous . Dangerous , unpredictable lava flows and harsh conditions , as well as native predators , were all obstacles to be overcome if Tann was to be successful in her mission . The main energy repositories — which Tann sought to capture — were located atop Mount Corvast , a large volcano , alongside the massive Mount Corvast Citadel . Corvast was well - defended , though , with a thick web of Republic forces surrounding it and four major Republic military installations located between Tann ' s position and the volcano . Tann and Dooku knew that the Republic forces , on full alert having just suddenly lost contact with their primary defense grid , would put up a stern resistance , but they believed that , with the Decimators giving them a marked advantage , they would triumph over their opposition . Battles on Sarapin . Tann built a base near to where she landed on Sarapin , and began preparing for her impending strike on the Republic . Mount Corvast ' s defenses were primarily geared towards repelling attacks from the air , with many anti - air units , so Tann opted to build up her ground forces instead . As well as destroying the Mount Corvast Citadel , Tann was to destroy all drill platforms between her base and Mount Corvast , further disrupting the Republic , though she was to take precautions to ensure that the planet ' s collection repositories remained intact , so that the Confederacy could make use of them after they had fully captured the planet . Having prepared her forces , Tann sent her battle droids to attack the first Republic military installation . To reach it , they had to make a perilous journey on narrow walkways , surrounded by lava , tussling with native vaapad s . Additionally , lava blowholes dotted the area ; magma contained within deep fissures spitted out frequently , destroying anything that was standing over the blowhole . Traveling over the walkways and blowholes via air transports was ruled out because of the Republic anti - air units . The Separatists eventually arrived at the first Republic installation , protected by a number of AT - TEs , infantry , and IG - series assassin droids , but Tann ' s forces were able to overcome them , with the advantage given to them by the Decimators . The second Republic camp was larger and more spread out , but aside from turrets , was relatively undefended , and Tann ' s forces again razed it . As they moved , they destroyed the Republic energy drills . The third and fourth Republic camps were lightly armed and posed no problem for Tann . Tann and her forces then clashed with the Republic defenses posted on the slopes of Mount Corvast , which consisted of further AT - TEs and mounted clone troopers . Using the stolen Decimators , the Separatists overcame these defenses as well as reinforcements sent from within the walled Republic base which contained the Mount Corvast Citadel . Tann ' s forces entered the base , routing the remaining Republic forces . When the Separatists began getting close to the citadel , reinforcements under the command of Jedi Knight Jor Drakas attacked Tann . She was able to defeat them , slaying Drakas personally and ending the Republic ' s defense of the planet . Sarapin was in Separatist hands , its collection repositories ready for Separatist use ; the Mount Corvast Citadel was destroyed , as was Sarapin ' s geothermal generators , vaporized by the Decimators . Dozens of Core Worlds plunged into darkness . Coruscant was among those worlds , with some regions of the galactic capital losing power ; panic began to take hold in the Core Worlds , and the Senate was in uproar . Dooku was pleased with Tann ' s efforts , and she had once again surpassed his every expectation . Because of her success , she became one of his most valuable assets , and held more sway than any other Separatist general , even the cyborg Jedi killer Grievous . In the wake of her success at Sarapin , Dooku contacted Tann to inform her that she would be traveling to the planet Krant , where the CIS had begun manufacturing their own Decimators using the Republic ' s designs . She would oversee operations there , in preparation for her next assignment from Dooku , while Zian Finnis was placed in charge of Separatist operations on Sarapin . Tann traveled to Krant , establishing a base there . The maze - like base was heavily defended and located in the midst of an expansive jungle , though Tann ' s efforts were occasionally disrupted by native Wookiee colonists . The Trade Federation , part of the CIS , had an illegal mining operation located on one of Krant ' s moons , Aereen , led by the Neimoidian Plure Barron , which Tann used to provide her operations on Krant with power . Republic counterattack . The Republic counterattack on Sarapin was swift . Echuu Shen - Jon , whose Padawan , Stam Reath , Tann had killed at Geonosis , was tasked by the Jedi High Council with retaking the planet , along with his new Padawan , Naat Reath , Stam ' s sister . Both wanted vengeance for Stam ' s death , and together they were able to retake Sarapin with a large force of clones , capturing Zian Finnis . The Council had decided that Tann was a threat that needed to be stopped as quickly as possible , so Shen - Jon and Reath were put on her trail , and they were led to Krant by Jabba Desilijic Tiure on Tatooine , a rival of Boorka . Shen - Jon then captured Aereen and built a base there , to prepare for a Republic strike on Krant . While on Aereen , he learned that Tann would be inspecting Decimators at one part of the CIS facility , and decided to assassinate her . Shen - Jon took a task force to Krant ' s surface in preparation for his attack on Tann . He attacked , with help from the remaining Wookiees who had not fled offworld , defeating the CIS forces and battling his way through the compound . Tann remained in her ship for the battle , waiting for the inevitable confrontation with Shen - Jon . The Republic forces were able to destroy the remaining Decimators and construction facilities , which saw a permanent end to the weapons , before Shen - Jon and Reath came searching for Tann . They quickly found her ship ; she emerged from it , engaging the two Jedi in lightsaber combat , with no other beings present . After a brief duel , Tann managed to subdue Reath and kidnap her , taking her aboard Tann ' s ship and fleeing deeper into the Krantian forests . Tann took Reath to the heavily - fortified Separatist fortress , located in the heart of the Krantian forest . She had the Padawan placed in stasis , and awaited Shen - Jon ' s arrival . The Jedi Master pursued them , eventually penetrating the Separatist defenses and attacking the stronghold . When his forces began to get close to Tann ' s location , she told Shen - Jon to approach her alone , threatening to end Reath ' s life if he brought any additional clone forces with him . Shen - Jon did as instructed , and when he reached his Padawan in stasis , Tann revealed herself and attacked him . During his search for Tann , Shen - Jon had unwittingly turned to the dark side of the Force in his lust for vengeance over Stam Reath ' s death by Tann ' s hands , and the Chiss general could feel the dark side radiating from him . She mocked him , asking if he would like to take her place at Dooku ' s side , and see the end of the Republic and Jedi as the count planned . Tann and Shen - Jon engaged each other in combat once again , with Reath watching on , helpless and unable to move in the stasis chamber . Calling on the power of the dark side , Shen - Jon cut Tann in half with one swift sweep of his lightsaber . With her dying words , she told him that the Jedi would ultimately be wiped out in this war . Shen - Jon , acknowledging his fall to the dark side , decided to flee into the Krantian wilderness and become a hermit , while Reath returned to Coruscant to report Tann ' s death to the council . Tann ' s demise was a setback for Dooku , who had planned to use her further against the Republic . Having lasted just a month in the Clone Wars , she was replaced as the Confederacy ' s top general by Grievous , who became the Supreme Commander of the Droid Armies . Asajj Ventress replaced her as the leader of Dooku ' s Dark Acolytes . The Republic Senate subsequently put a stop to the Decimator project . Her lover , Vandalor , worked for Dooku against the Republic after Tann ' s death , until he was killed by the Jedi Anakin Skywalker while fighting for the Confederacy on Metalorn , and the CIS ultimately lost the war . Being one of the few Chiss to ever leave Chiss Space , Tann was a figure of great interest to historians and sentientologist s of later eras , who speculated on how she came to leave her people . Personality and traits . Sev ' rance Tann was confident in her abilities . She had every belief that she would be able to carry out any tasks Dooku asked of her ; when ordered to capture Sarapin , she boasted that she could have it under control within a single day . She thought little of the threat posed by Jedi Knight Jor Drakas , defeating him in combat , and had enough faith in her abilities to fight against Echuu Shen - Jon and his Padawan without any backup . This ultimately led to her demise , as Shen - Jon killed her . Tann was known to mock her enemies , and she respected neither her adversaries nor their abilities . After killing Stam Reath during the Battle of Geonosis , she mocked his master , and during her final duel with Shen - Jon , she ridiculed him numerous times , contemptuously asking if he had any more Padawans she could take away from him and if he wanted to take her place as a Dark Acolyte . Tann was persuasive , able to persuade other Separatist forces not under her command to join her group during the Battle of Geonosis , and she expected she could manage to influence Boorka the Hutt to trade with the CIS . Tann was ruthless ; during her time in the Chiss Academy , having been tasked with a difficult assignment , she killed one of the wild Yresilini creatures she had been told to tame despite his having done nothing wrong . Her actions were supposed to engender obedience among his comrades , making them fearful that they too would meet the same fate if they disobeyed her . They followed Tann ' s orders to a tee , never questioning them . Powers and abilities . Sev ' rance Tann was known for her knowledge of military strategy and military tactics , and she successfully commanded numerous battles during the Clone Wars . She also actively participated in combat during her battles , unlike other Separatist generals , wielding her lightsaber alongside the Separatist infantry . Tann was also Force - sensitive and trained in the ways of the dark side by Count Dooku . She fought with a yellow - bladed lightsaber , defeating at least two Jedi with it during the Clone Wars . Unlike some of her fellow Dark Acolytes , she could conjure up Force lightning , which she had used on many of her missions . Ultimately , Tann was more at home as a general than a Dark Acolyte . No one was able to outfox her tactically in the Clone Wars before her death , but she was ultimately defeated in lightsaber combat by Master Echuu Shen - Jon . Behind the scenes . The character of Sev ' rance Tann was created for " " , an expansion pack for the computer game " " . Voiced by Paula Killen , Tann is a playable hero in the game as part of the Confederacy campaign , and subsequently acts as a villain in the Republic campaign , in which she is killed . The character also receives a biography in the in - game DataBank , which details her backstory . Tann has since been referenced in " The Official Star Wars Fact File " , " The New Essential Chronology " , " The New Essential Guide to Alien Species " , and " The Complete Star Wars Encyclopedia " . " The New Essential Chronology " , by Daniel Wallace , presented an alternate capitalization of her name : in " Clone Campaigns " , " The Official Star Wars Fact File " and " The Complete Star Wars Encyclopedia " , it is " Sev ' Rance , " but Wallace spells it " Sev ' rance , " and this has been repeated in subsequent sources . " The New Essential Guide to Characters " connected her with another video game character of the Chiss species , Vandalor , who appears as an antagonist in " " . Tann is established to be the leader of the Separatist Droid Army in " Clone Campaigns " , with the " New Essential Chronology " reinforcing that . Because of this , some fans believe she held the title of Supreme Commander , later given to General Grievous , which was not held by Grievous until the Mission to Trenchant space station , after Tann ' s death . Abel G . Peña , author of " " , has stated that Tann would be the prime candidate to hold the title , but that it may not have existed until it was given to Grievous . Tann is established as a Chiss in " Clone Campaigns " , which somewhat contradicts other sources such as " The Hand of Thrawn Duology " , which establish that Chiss were not discovered by mainstream society until long after the Clone Wars . However , while her species and homeworld is established within the " Clone Campaigns " DataBank , they are not referred to in the game itself , so presumably other characters were unaware of her origins . " The New Essential Guide to Alien Species " , authored by Helen Keier and Ann Margaret Lewis , addressed the issue by stating that Tann and Vandalor were likely taken to the Republic on the recommendation of Thrawn , an ally of Darth Sidious . " The Complete Star Wars Encyclopedia " explicitly establishes that Tann was taken from Chiss Space by Sidious . However , no source has addressed the discrepancy with Tann ' s name and the usual Chiss naming convention , with Chiss names consisting of three distinct sections separated with apostrophes , such as " Mitth ' raw ' nuruodo . "