Duel on Mustafar / Legends The Duel on Mustafar was a confrontation during the Great Jedi Purge in 19 BBY , where the recently apprenticed Sith Lord , Darth Vader , fought his former best friend , and Jedi Master , Obi - Wan Kenobi , on the Outer Rim planet of Mustafar . After gaining knowledge of Skywalker ' s downfall from Grand Master Yoda at the Jedi Temple , Kenobi arrived on Mustafar , where he attempted to reason with Vader , not believing that Emperor Palpatine , also known as the Sith Master , Darth Sidious , had taken control of his mind . However , Vader no longer cared for their friendship , and quickly claimed that Kenobi was his enemy ; the pair then ignited their lightsabers and locked blades , fighting through the murder scene in the Klegger Corp Mining Facility , where Vader had recently slaughtered the members of the Separatist Council , the legislative branch of the now - defunct Confederacy of Independent Systems . The fight progressed on the structures of the massive facility that hovered over the deadly lava of Mustafar . Kenobi and Vader soon found themselves trapped on a structure collection arm connected on the facility when it was separated from the facility by the lava and descended onto a hot stream . Kenobi managed to fall onto a lava skiff that was heading in the opposite direction of the fallen collection arm in the stream . Vader soon followed and jumped onto a droid collector where the two continued to fight . Kenobi managed to jump onto a high lava bend slope , and claimed that the duel was over due to his advantage . The Sith attempted to follow , but Vader , in his hubris , failed to block Kenobi ' s final attack , a mou kei maneuver , which severed Vader ' s remaining organic limbs , and Vader rolled down to the edge of the lava bend , bringing the duel to an end . Then , Kenobi — overcome with remorse over his friend ' s transformation — cried out that he had believed that Vader was the Chosen One and his destiny was to destroy the Sith , but instead he joined them . Unable , but most likely unwilling , to connect with his former best friend , the Sith was consumed by the fires of the lava that leaked onto the lava bend ; leaving Vader to die , Kenobi retreated and took his fallen apprentice ' s lightsaber . Afterwards , Vader ' s " new " master , Darth Sidious , found his injured apprentice and took him back to the galactic capital of Coruscant to be rebuilt ; the suit that Vader donned there would be one that the Dark Lord would wear for the rest of his life . Prelude . The Great Jedi Purge had begun after three years of fighting between the Confederacy of Independent Systems and the Galactic Republic , which reorganized into the Galactic Empire soon after Supreme Chancellor Palpatine revealed himself to be Darth Sidious , and battled Jedi Master Mace Windu . Anakin Skywalker approached Sidious and Windu in the rising climax of their duel in Palpatine ' s Chancellor office . Skywalker severed Windu ' s lightsaber hand as Windu attempted to kill Sidious to end the corruption of the Sith . Sidious , who had fallen after Windu kicked him on the edge of the window in his office , unleashed Force lightning upon Windu and pushed him out the window , and Windu fell to his death . Overcome by emotion , Skywalker accepted Sidious ' offer to turn to the dark side and become his new apprentice . Sidious then gave Skywalker the Sith moniker " Darth Vader " ; it was a successful conclusion to Sidious ' decade - long plan to turn Skywalker to the dark side with the fear of losing his wife , Padmé Amidala . Vader wanted to learn of the mysterious Sith power which Sidious had told him of , a few days before , in the Galaxies Opera House on Coruscant , that could ultimately save Amidala from her apparently upcoming death in childbirth , according to dreams Vader had the night after the crucial Battle of Coruscant . Sidious told his new apprentice that in order to become strong enough in the dark side to save his wife , he must to the Jedi Temple with the 501st Legion ( which usually accompanied Skywalker during the Clone Wars ) and kill everyone there , younglings and all . This would end the " Jedi Rebellion " which began with the attempt on the Chancellor ' s life by Windu . After the dark deeds that he committed in the Jedi Temple , Vader was sent to the Mustafar system to end the Clone Wars by killing the remainder of the Separatist Council . In the aftermath of the Mission to Mustafar , Obi - Wan Kenobi and Yoda watched security holograms of Anakin taking part in the slaughter at the Temple . Kenobi offered to go after Palpatine ; he could not bring himself to strike down his former Padawan and friend . However , Yoda told Kenobi that he would never be strong enough to fight the Emperor head - on . He also told Kenobi that the Anakin he knew no longer existed , and had to be put out of his misery . Kenobi then went to Padmé to learn Vader ' s whereabouts . Amidala told him that the last time she had seen Vader was the previous day , but didn ' t tell Kenobi that he had left for Mustafar . Kenobi revealed to Amidala that her husband had turned to the dark side . Amidala didn ' t believe Kenobi at first , but Kenobi told her of the raid of the Jedi Temple . However , Amidala still could not tell Kenobi that Vader was on Mustafar . Amidala left Coruscant in her personal yacht with C - 3PO , her personal protocol droid built by Vader , to find her husband and learn the truth behind all of this . Shortly before Amidala took off , Kenobi secretly went aboard the yacht and hid inside one of the cargo - hold storage rooms . Arriving on Mustafar , Vader noticed Amidala ' s ship and ran to her . The couple had a brief meeting where Amidala revealed that Kenobi knew that she was pregnant with Vader ' s child . Heartbroken , Amidala wanted Vader to stop and come back to the light because she loved him , believing there was still good in him . Vader , mad with power , refused , instead trying to get Padmé to join in his plan to kill Palpatine and take over the galaxy himself . Upon seeing Kenobi emerge onto the boarding ramp of Amidala ' s ship , Vader incorrectly deduced that Amidala had sent Kenobi to kill him . The Sith apprentice Force choked his wife , while Kenobi demanded that he release her . Enraged , Vader believed that Kenobi had turned Amidala against him . Kenobi could not believe that his former apprentice let Palpatine mess with his mind . Vader then declared that he no longer feared the Dark Side , and also implied designs to take over the Empire , also telling Kenobi that he ' s his enemy , if he isn ' t with him . Kenobi , realizing such talk meant Vader was fully immersed in Sith philosophy , realized there ' s no bringing Vader back . Unable to see eye - to - eye with his former best friend , Kenobi drew his lightsaber . Vader followed suit and leaped at his former master with his own saber ignited . The duel . Using the jump as a fulcrum for a vicious overhand , Vader unleashed a flurry of attacks and rapidly gained ground on Kenobi , driving him to the edge of the platform . Kenobi attempted to rally , working his way around Vader and away from the brink , though the Sith Lord easily held off his attacks and kicked him soundly in the chest , sending the Jedi flying backwards . Kenobi managed to recover and land on his feet , though he was again driven back by Vader ' s vicious frenzy . Kenobi relied on his staunch Soresu defense to hold off Vader ' s brutal barrage of Djem So attacks . Fighting along the catwalks and corridors within the mining facility , the two combatants entered the small antechamber outside the control room . Here , Kenobi attempted to take advantage of an opening in Vader ' s offense , seizing the Sith Lord ' s left hand and pulling him into an arm - lock before slashing at the back of his neck . Vader managed to bring his blade up to defend himself , and quickly wrestled free , renewing his attack . Kenobi retreated into the control room , attempting to distract him by triggering the blasters held by the mangled battle droids in the room and redirecting some of the shots at Vader , though Vader made short work of them . Kenobi managed to disarm Vader by using the Force to momentarily reverse the polarity of the electrodrivers in Vader ' s prosthetic hand , causing him to drop his lightsaber . Kenobi then used the Force to summon Vader ' s lightsaber to his hand . However , Vader was unfazed , and he grabbed Obi - Wan ' s wrists , squeezing with his prosthesis on the hand that held his lightsaber until Kenobi was forced to drop it . Now unarmed , their duel degenerated into a brawl within the adjacent conference room , Vader kept hold of Kenobi ' s lightsaber hand with his left while clamping down on the Jedi ' s throat with his prosthetic and began bending him back , simultaneously throttling him and forcing Kenobi ' s lightsaber closer to his face . Kenobi narrowly managed to kick Vader off of him , though Vader quickly retaliated in kind , disarming Kenobi . Vader charged again , though Kenobi responded by sidestepping and kicking Vader in the chest . Vader flipped over and landed heavily on his back , and Kenobi telekinetically reclaimed his lightsaber and moved to finish his supine enemy , though Vader managed to retrieve his own weapon and defend himself . The duel progressed back into the control room , where Kenobi attempted to rally , remaining toe - to - toe with Vader as they engaged in a swift flurry of swordplay . The bout ended with the two engaged in a blade - lock , which Kenobi attempted to break with a Force push , though Vader managed to counter with one of his own , beginning a vicious power - struggle . Eventually the air - pocket compressed by the combined Force pushes ruptured and exploded , flinging both duelists against opposite walls . Vader recovered first , leaping across the control room at Kenobi , who narrowly managed to evade the attack and pin Vader ' s blade against a console . However , their misdirected weapons accidentally destroyed the power controls for the facility ' s shields , exposing the exterior of the facility to the intense heat of Mustafar ' s lava flows . Because of the shields being deactivated and the facility becoming vulnerable to the heat and flying lava , alarms were also activated both in the interior and exterior of the facility . Vader renewed his attack , though Kenobi managed to direct one of his blows into the door controls behind him , kicking Vader back to give himself a moment to regain his composure as he retreated through the open portal . Vader came on again , driving Kenobi out onto the exterior balcony , loosing a flurry of attacks before kicking the Jedi Master hard in the face . As Kenobi gave ground , Vader started slicing shards of metal out of the walls , telekinetically blasting them at Obi - Wan . Driven to the end of the balcony , Kenobi leaped backward onto a steam pipe , retreating along it with Vader in close pursuit . Attempting to gain the offensive , Kenobi attacked first , only to be driven back by Vader ' s relentless assault . Leaping off the pipe onto one of the collection arms below them , Kenobi again attacked , though Vader easily fended off his blows before knocking Kenobi aside with a heavy backhand . Vader again seized the offense , viciously driving Kenobi back along the arm , despite Kenobi ' s staunch resistance . As the duel continued , a massive spurt of lava erupted onto the unshielded collection arm , and began to melt the metal . Retreating to the relative safety of the structure at the end of the arm , the two watched as the heat and weight of the lava melted the arm ' s superstructure . As it became clear that the arm was going to break off of the complex , the combatants fled up along its length as the arm plummeted into the river of lava below . As the collection arm was dragged along the river , Vader kept up his onslaught , driving Kenobi further up the arm . As the river flowed with the collection arm toward a lava fall , Kenobi leaped onto one of the severed support cables with Vader in pursuit . After a quick bout of swinging attacks , Kenobi swung out away from the arm to the utmost limit of the cable and let go , landing on a large repulsorlift platform . As the arm began to topple over the lava fall , Vader swung back onto it and charged along its length before leaping onto a Mustafar Panning Droid . Directing the collector toward Kenobi ' s platform , Vader resumed his attack . Vader ' s fall . Kenobi was cut off from the shore by the nimble lava collector droid Vader was perched on . Slashing at Vader , Kenobi began another bout of bladework with the Sith Lord before breaking off . Kenobi tried again to reason with Vader one last time , only to receive more threats and pro - dark side rhetoric . Vader leaped above Kenobi onto the platform , landing awkwardly and almost losing his balance . Kenobi attempted to take advantage of this and attacked , but Vader managed to recover and countered , beginning another flurry of swordplay . As they locked blades , the platform neared the shore , allowing Kenobi to disengage and leap to the higher ground . Perched on a rise above the lava river , Kenobi warned Vader that he had the high ground and attacking him would be useless . Blinded by rage and arrogance , Vader leaped at Kenobi , blade angled for the kill . However , he left himself open , allowing Kenobi to sever Vader ' s left arm and both of his legs with a swift " mou kei " strike . Dropping his lightsaber , Vader rolled to the brink of the lava river . Attempting to crawl up the shore with only his mechanical arm , Vader only slid closer to the lava . Kenobi retrieved Vader ' s lightsaber while tearfully expressing his regrets , shame , and disappointment . Vader screamed his hatred for Kenobi before he slid too close to the lava and burst into flames , leaving him horribly burned and disfigured . Despite Vader ' s obvious pain , Kenobi refused to kill the Sith Lord , believing that his ultimate fate would be decided by the Force , and doing so , even to euthanise the Sith Lord , would only cause the Jedi Master himself to start down the path of the dark side . Kenobi left Vader to whatever end he was destined for as the flames slowly calmed down from the immolation . Aftermath . After his duel against Grand Master Yoda , Darth Sidious , sensing that his new apprentice Vader was in danger , had left Coruscant . The Dark Lord was accompanied by a squad of Clone shock troopers . Journeying to Mustafar in a " Theta " shuttle , they landed in the Klegger Corp Mining Facility and found Vader , still alive and trying to claw his way up the shore , with severe third - degree burns over nearly all of the remainder of his body . Vader was taken to the Emperor Palpatine Surgical Reconstruction Center on Coruscant for treatment ; Vader would wear a respirator and full body suit for the rest of his life . The newly self - appointed Emperor initially considered leaving Vader to die for his failure . However , he decided against it when he realized that , failure or not , it would be a waste to just abandon Vader after spending more than a decade corrupting him into becoming his Sith apprentice . Padmé died of a broken heart soon after being rescued , but not before giving birth to two twins , Luke and Leia , on Polis Massa , an Outer Rim territory that was dedicated to medical purposes . After helping to deliver Amidala ' s children , Kenobi and Yoda went into exile . Kenobi took Luke to the desert planet of Tatooine to be raised by Skywalker ' s stepbrother and stepsister - in - law , while Bail Organa raised Leia on Alderaan with his wife . Kenobi hid on Tatooine , and waited for the day when Luke could be trained as a Jedi . Kenobi , who had believed that Vader had died on Mustafar , was shocked to learn that he was still alive after watching a HoloNet news report in a cantina on Tatooine about Vader ' s victory at Kashyyyk . The Force ghost of Qui - Gon Jinn , Kenobi ' s former master , however , told Kenobi that Vader would never return to Tatooine , as the planet held the remnants of his former persona of Anakin Skywalker , which would be too painful for Vader to face . Kenobi later reflected in the " " that his duel with Vader had been very savage . Despite Vader eventually making a mostly successful recovery , the physical and emotional trauma caused by Vader ' s transformation diminished his Force potential . Due to Vader ' s injuries , Sidious would always keep half an eye out for a potential replacement for his apprentice . However , Sidious realized that finding another apprentice as powerful as Vader was extraordinarily unlikely , and , despite Sidious ' s sociopathic tendencies , he had actually developed a small degree of affection for Vader . Oddly enough , it appears that , despite his disappointment with Vader ' s condition , Sidious may have deliberately sabotaged Vader ' s recovery and training to keep him from rebelling . In 3 BBY , Sidious discovered that Vader was training a secret apprentice and attempted to replace Vader with the apprentice . However , his potential replacement rejected the dark side and sacrificed himself to save the fledgling Rebel Alliance . Nineteen years after the duel , Kenobi gave Luke Skywalker his father ' s fallen lightsaber . Kenobi had recovered the lightsaber after their duel on the high lava bend slope on Mustafar . However , Kenobi chose not to reveal to Luke what his father had become . Instead , he told Luke a deliberately deceptive story , using wordplay to make it appear that Vader and Anakin had been two physically separate individuals , and that Vader had killed Anakin . Later on , he encountered Vader again . This time , he was struck down , and became a Force ghost . Four years later , Vader brought Luke to his master aboard the second Death Star over the forest moon of Endor . Skywalker and Vader fought in front of Sidious , and the young Skywalker tried to use high ground to his advantage by Force Jumping onto a ceiling walkway . However , Vader had apparently learned from his mistake at Mustafar , and did not leap up after his son , instead opting to dislodge him from his perch using a throw of his lightsaber . Vader shifted the advantage to himself , but Skywalker soon defeated his father after Vader ' s Dun Möch attempt failed . Sidious responded to Luke ' s refusal to kill his father and embrace the dark side with a barrage of Force lightning . What was left of Anakin , unable to bear the thought of his son being killed , overcame the dark side ' s hold on him . Anakin redeemed himself and fulfilled the Prophecy of the Chosen One by grabbing the Emperor and throwing him to his death . However , Anakin was mortally wounded by his master ' s lightning . In 35 ABY , Luke sent his astromech droid , R2 - D2 , to the outer rim planet of Ossus to undergo repairs . Zakarisz Ghent , a slicer and Crypt Chief of the New Republic , was able to unlock a recording of a lightsaber battle from R2 while he was repairing the droid . Luke was shown holographic images of the climatic duel on Mustafar from the droid . Luke saw , for the first time , his father fighting his old mentor , and his and Leia ' s birth mother injured from his father ' s Force choke before the duel . Behind the scenes . The duel was a highly anticipated event in " Star Wars " fandom . It was already established in creator George Lucas ' s notes and canon that Master and Apprentice had a semi - final duel , and that Vader owed his severe injuries to lava . Mentions of that duel and Vader ' s fall had been mentioned in " " , where Kenobi dueled Vader aboard the first Death Star . Origins of the duel could be traced to the Original trilogy , during which Vader had numerous visible scars on his pale white head , seen after Luke removed Vader ' s mask in " " , as well as early versions of " The Star Wars " in the early 1970s . Just before the duel , after Vader told Kenobi " If you are not with me , then you are my enemy ! , " Kenobi responded with " Only a Sith deals in absolutes . " Lucas intended for this line to reflect what he believed to be the viewers ' views on then President George W . Bush ' s War on Terror , particularly Bush ' s black - and - white views of the world , as the film itself had been written on March 2003 , around the time of the second Iraq War , which also included protests in the Bay Area against the war and Bush in particular in a similar manner to the protests against the Vietnam War and Nixon during the 1970s . Similarly , Vader ' s line of " If you are not with me , then you are my enemy ! " itself was intended to be a direct reference to Bush ' s line to Congress on September 20 , 2001 , " Either you are with us , or you are with the terrorists , " shortly after the events of the September 11 terrorist attacks by al Qaida . The duel itself took Lucas nearly two weeks to complete , and only took up half of a paper . During the animatics stage , Steven Spielberg , a filmmaker in Hollywood and a friend of Lucas , participated in the production of the duel . Ewan McGregor , who portrayed Obi - Wan Kenobi in the prequel trilogy , and Hayden Christensen , who portrayed Anakin Skywalker in and , practiced the duel constantly for several months . As a result of their practice , the speed in which Kenobi and Vader engage the duel ( in the completed film ) is the speed in which it was filmed , and was not digitally accelerated . George Lucas named the duel " The Duel on Mustafar " in an interview in the documentary " " . This battle is the third of only three times in the whole " Star Wars " series that people wielding the same - colored lightsabers fight each other ; the first was Kenobi ' s fight with General Grievous , and the second was Vader dueling Jedi shown on a security hologram . There was initially going to be some dialogue where Vader begs Kenobi for help after being defeated and even reaches out for him , but Kenobi , while acknowledging he loved him and initially thinking he should help him , refuses to help , with Anakin ' s eyes turning from blue to the trademark yellow of the Sith . Although the action of Anakin reaching out was kept intact to a certain extent , the sound was muted out , and Kenobi ' s words were altered to " You were my brother , Anakin ! I Loved you . " In addition , it was initially intended by Lucas that MacGregor deliver the line in a soft and somber tone in order to imply that he viewed Anakin as dead by that point , though MacGregor suggested the line be revised to be a bit more clear as to the intended meaning . " Revenge of the Sith " related media . In the XBox and PS2 versions of the of " Revenge of the Sith " , an alternate dark - side ending has Vader avoid Kenobi ' s Mou Kei strike and impale him from behind , before contemptuously kicking the fallen Kenobi ' s corpse down the slope . Vader then meets the newly arrived Darth Sidious , receiving a new red lightsaber from the Sith Lord . Momentarily inspecting his new weapon , Vader then turns on Sidious , plunging the weapon into the Emperor ' s chest , declaring that he now ruled the galaxy . In addition , Padmé Amidala ' s role was omitted , but Vader mentions Kenobi turned her against him during the duel . Instead of Vader and Kenobi jumping onto a structure pole , Kenobi jumps down to a new section of the facility that was shown in the movie . Chasing after Kenobi , Vader follows him and the two continue their brawl on the lower section platform . Another difference is that Vader can also conjure Force lightning , a Force power that Vader did not use in the movie . The scene where Vader and Kenobi fight on the fallen structure arm was only shown as a video clip of the movie and is not playable . The video clip cuts into Vader jumping onto the lava barge with Kenobi , instead of the droid collector . After Vader jumps and is defeated , Kenobi picks up Vader ' s fallen lightsaber and then leaves the scene without talking to Vader . In addition , their dialogue right before the duel omits Kenobi ' s siding with the Old Republic and by extension democracy , as well as Vader and Kenobi ' s retorts that the latter ' s his enemy if he isn ' t with him and that dealing in absolutes is a Sith - exclusive trait , respectively . In the DS and GBA versions , the duel was closer to the film version , although the dialogue was shortened near the beginning . The duel itself also had them jump down from the platform they were on onto another platform , and midway through the battle land on a raft over a lava flow . Also , the " Ultimate Revenge of the Sith Ending " is omitted , and likewise the ending of the duel has Anakin being cut down by Obi - Wan , regardless of who the player was playing as , although the ending will vary between showing Padmé ' s death from childbirth to Vader being reconstructed depending on whether the player was playing as Obi - Wan or Anakin , respectively . Another difference is that Anakin does not utilize Force lightning in the GBA and DS versions . The background music ( specifically , which version of Duel of the Fates is used ) for the battle is different between the GBA and DS versions : In the GBA version , it used a synthesized version of the version used in " Revenge of the Sith " and " The Phantom Menace " ; in the DS version , it utilized the brief version from " Attack of the Clones " , complete with lyrics . The of " Revenge of the Sith " slightly alters the duel . Scenes in which Vader and Kenobi fight inside the facility are longer . Omitting the sequences where Kenobi and Vader fight on the Separatist council table in another room , the duel continues onwards in the control room . They exit when Kenobi uses a parry to redirect both his and Vader ' s blades into the wall , cutting it open . Vader then kicks Kenobi through the hole onto the exterior balcony , and the two make their way towards the structure arm , which was cut by lava . After the structure arm falls onto the lava , Kenobi jumps out and lands on a lava barge and Vader follows . The two exchange words as it appeared in the movie , with alternate dialogue . Obi - Wan ' s finishing move on Anakin is described as a defensive maneuver rather than an offensive one ; his attempt to parry Vader ' s blade accidentally cut off his legs , and he cut off Vader ' s remaining organic arm while spinning around to guard . The " Revenge of the Sith " and the featured the duel , but these were shorter encounters than the film depiction as the scenes where Kenobi and Vader fought inside the facility were removed . These were replaced with the two fighting outside on the platform until they progress to the structure arm . " " appears to map the battle incorrectly , showing the combatants abandoning the arm almost immediately , never even making it to the falls , and traveling downriver on the droid and repulsor platform . In the " " and the duel consisted of differences such as reorganizing certain parts of the duel inside the facility , which also differed in appearance from that of the film , to allow hidden easter egg s to be found . There is a sequence during the duel in which the two assist each other to save themselves from the planet ' s lava . There is also a LEGO brick set released in 2005 that depicts their fight on the arm and allows players to mock the duel by manipulating the figurines with poles . In the video game " " , the duel isn ' t shown as the game follows only the battles of 501st Legion . However , in Instant Action mode , if Mustafar is played with heroes during the Galactic Civil War , the Rebel hero will be Obi - Wan Kenobi and the Imperial army will be lead by Anakin Skywalker , not the separate Darth Vader . This is non - canon , as neither forces were involved in the duel . In the episode " Ghosts of Mortis , " Anakin Skywalker was shown visions of his future by the Son that included portions of the events of " Revenge of the Sith " . These visions included his strangling of Padmé Amidala with the Force and his defeat during the duel with Obi - Wan Kenobi .