Mustafar / Legends Mustafar was a small planet located in the Mustafar system of the Outer Rim Territories , coreward of Rutan , between the Hydian Way and the Ninth Quadrant . A fiery volcanic world where lava was mined like a precious natural resource , Mustafar often served as a place to dispose of unwanted evidence , a quality which drew Black Sun to the planet . During the Clone Wars , when Darth Sidious hired Cad Bane to kidnap Force - sensitive children so he could conduct Sith experiments , Anakin Skywalker and his Padawan , Ahsoka Tano went to recover the 2 children already kidnapped by Bane . When nurse droids noticed the Twilight , Anakin ' s personal ship incoming , Darth Sidious ordered the droids to let the building sink into the lava river . They complied and hid in the dark building with the children . When the Jedi entered the doomed facility , the droids attacked the Jedi , but to no avail . In the end , Skywalker and Tano freed the children , returned them to their homes , and the facility was no more as it sank beneath the fiery waves . It also drew the Sith : it was on Mustafar that Darth Maul began his Sith training . Mustafar also served as the last capital of the Confederacy of Independent Systems , and was the site of the Separatists ' downfall , an event that shaped galactic history . In a duel that followed , Darth Vader fought his former master , Obi - Wan Kenobi . The former Jedi lost and was severely burnt after he was caught on fire by one of Mustafar ' s lava rivers , forcing him to wear a suit of dark armor to live . Description . Mustafar was a very young and volatile world , torn apart by opposing gravitational forces of the gas giants Jestefad and Lefrani , with the former being the closer of the two . Astride thick - skinned lava fleas , the native Mustafarians leapt across the lava fields to mine the planet ' s unique and valuable minerals present in the lava . The intense geological activity creates natural scanning interference that has kept prying eyes away from Mustafar for most of its history . The Mustafarians oversaw the mining facilities constructed by the Techno Union on the planet . History . Early history . Once a lush green world , Mustafar was home to a Jedi Enclave built around 5300 BBY . Jedi Master Chu - Gon Dar , an individual whose mastery of physical Force was unmatched , also lived there . He created a unique Force - sensitive object while on the planet known as the Chu - Gon Dar cube which was used to both channel and manipulate the physical Force to alter the physical properties of an item placed inside it . However , in 3996 BBY , the resurgent Sith wished to exterminate the Jedi , and so a climactic battle took place on the planet . This battle was so intense that one of the nearby gas giants was pulled into its current location by the Force , starting the gravitational tug - of - war . The environmental hazards caused by this forced the Jedi to abandon their temples on the planet . This caused all knowledge of Chu - Gon ' s cube to be lost . Mustafar would also be the home of the Force organization the Blackguard . Mustafar was home to two variants of sentient Mustafarians — the northern Mustafarians , who were tall and thin , and the southern Mustafarians , who were short and squat . Centuries ago , a cataclysmic eruption destroyed all Mustafarian settlements except for Fralideja . Clone Wars . At the time of the Clone Wars , the Techno Union had owned Mustafar since c . 300 BBY , harvesting minerals and energy from the 800 - degree - hot lava . It was comparatively cool compared to most other lava due to the unusual mineral allotropes that became molten at a lower temperature . Regardless , the lava could only safely be mined when a repulsor field was placed to repress any eruptions and deflect heat away from those harvesting it . But the Techno Union wasn ' t the only corporate power interested in Mustafar . Before the Clone Wars started , Damask Holdings maintained a facility on the planet , in a structure previously owned by Boss Cabra , Vigo of Black Sun . There , the Nightbrother child who would become Darth Maul was trained by Darth Sidious so that he could serve the purpose of the Sith Lord and his secret Master , Darth Plagueis . During the early years of the war , Supreme Chancellor Palpatine , in his guise as Darth Sidious , tasked the Duros bounty hunter Cad Bane with kidnapping Force - sensitive children and taking them to the Damask Holdings facility on the planet , where he could turn them into a cadre of Force – wielding spies for the Galactic Empire . The plot was scuttled by Anakin Skywalker and his Padawan , Ahsoka Tano . At some point prior to the second year of the war , Black Sun , under the leadership of Xomit Grunseit , moved its headquarters to a fortress on Mustafar . Death Watch , together with their new allies Darth Maul and Savage Opress , arrived in the Black Sun complex with an offer of allegiance . When Grunseit refused , Opress murdered all the members of his cabal , making Captain of the Guard Ziton Moj leader of the syndicate . The main Separatist stronghold was located in a massive industrial complex located on a fiery cliff bracketed by two huge lava flows . Collection arms mined lava from the area , while durable industrial droids worked further afield . Within this facility lay a Separatist command center , one of the most secure bunkers in the galaxy . Toward the end of the Clone Wars , Palpatine would continue to have a vested interest in the planet , ordering General Grievous to move the Separatist Council there near the end of the war , apparently for their own safety , but in reality to gather them together so that Skywalker , newly anointed as Darth Vader , Palpatine ' s new apprentice , could kill them all , and deactivate the droid armies , bringing about the end of the war . Shortly afterwards , a duel between Obi - Wan Kenobi and Darth Vader would also take place on the lava planet . Vader suffered grievous injuries , including the loss of his remaining limbs , and the searing of his lungs , when he attempted to jump to higher ground from a platform on the lava river , only to be immobilized by Kenobi . He was later rescued by Emperor Palpatine , who brought him back to Coruscant , where he was rebuilt into the feared cyborg executor of the Emperor at the Emperor Palpatine Surgical Reconstruction Center . It was also on this planet , immediately prior to the Kenobi / Vader confrontation , that Lord Vader , who , unknown to Padmé Amidala , was no longer the man she had married , Force choked the pregnant Senator of Naboo into unconsciousness . This would eventually contribute to the causes of her death , alongside the loss of will she suffered , as well as her broken heart . Imperial era . After the destruction of the Separatist Council and the Imperialization of the Techno Union , Mustafar was largely forgotten , until a Separatist stalwart , the fugitive Geonosian Gizor Dellso , holed up on Mustafar during the early days of the Galactic Empire and re - activated an independent battle droid factory , intending to rebuild the Confederacy ' s previous military strength . From 18 BBY to 12 BBY , he constructed a small army and a flotilla of warships above the planet , and got the support of several fellow Geonosians . One year later , the situation had been required by the attention of the loyal 501st Legion of stormtroopers to storm the planet . At the battle ' s end , with the droid schematics destroyed and Dellso eliminated , the Droid foundry was annihilated in a massive orbital strike from " Imperial I " - class Star Destroyers , which resulted in the fall of the Geonosian Industries , along with the fragmentation of the Separatist holdouts . At some point , Mensix Corp established the Mensix Mining Facility , built to replace the Klegger Corp Mining Facility complex . Galactic Civil War . Prior the time the Death Star plans were stolen , Twi ' lek mercenary Rianna Saren and Zeeo were sent to gather Intel on current Imperial operations and sabotage the Mirkanite Mining Facility . The mission was successful as the duo narrowly escaped from Imperial soldiers and a squadron of TIE fighters . After the destruction of the first Death Star , it was rumored that several would - be Jedi found their way to the legendary world of Mustafar , and were apparently guided on their path to Knighthood by the spectral form of Obi - Wan Kenobi . A disturbance caused by a gathering of dark side energy drew Kenobi ' s spirit to the planet . Other explorers at the time apparently encountered the ancient assassin droid HK - 47 along with an ancient " Hammerhead " - class cruiser . Post - Endor . The Sith Lord X1 , formerly a clone trooper , had made Mustafar his base of operations sometime during the New Republic era . X2 found his brother on Mustafar and led New Republic troops in a battle against X1 and his forces . After a fight over the planet , X2 and his troops descended to the planet ' s surface . X2 rescued Luke Skywalker who was on the planet intending to confront X1 . However he was captured , and X1 was planning to clone him in order to create an army of Dark Jedi . Once X2 destroyed his brother ' s cloning lab and rescued Skywalker , the two brothers dueled , ending with the death of X1 as well as the defeat of X1 ' s army . At sometime during 137 ABY , Mustafar came under the control of Darth Krayt ' s Galactic Empire . Behind the scenes . Mustafar was originally known as " Mufasta " in early drafts of " " . Ironically , Mufasta happens to be a primary translation for " The Chosen One " . The concept of a lava duel dates back to early versions of " " , in which Luke Skywalker battles Darth Vader over a lava lake in Palpatine ' s throne room in the lowest levels of the Imperial homeworld . Even back then , it was rumored that Anakin suffered his grievous injuries at the hands of Obi - Wan during a battle over a lava pit , and the concept became an almost mythical tale among " Star Wars " fans until finally realized on film over twenty years later . Joe Johnston envisaged the environment that would ultimately become Mustafar in a series of drawings designed to show Darth Vader ' s home . The novelization of " Return of the Jedi " previously stated that the duel between Vader and Obi - Wan , which resulted in Vader ' s terrible injuries , happened on a volcanic planet . The battle was stated in some sources predating the prequel trilogy to be on Sullust , also a volcanic world . Mustafar was originally designed to look like George Lucas ' s vision of . In " Revenge of the Sith " , while Darth Vader and Obi - Wan are fighting on the fallen arm , the lava flows backwards ( as can be seen by looking at the lava " waterfall " ) . Mount Etna was scouted for " " , to capture plate photography for backdrops in the Obi - Wan Kenobi vs . Darth Vader fight on Mustafar . Conveniently , Etna erupted during the making of the film , so Lucas sent a team to film it . The resultant moving image of lava flows could be used as backgrounds for the duel . These images could have been done by CGI , in theory , but it would have been more difficult and expensive than sending a few people to Sicily with cameras , as Lucas states in the audio commentary to Episode III . The Mustafar scenes took a lot of work and time from the many special effects workers . The lava was made of a with bright lights shining underneath it for the glow . The overview scene was built with a scale model in a pitch black studio . During filming , the room was filled with fog to create the steam effect . The actors were filmed on a green screen and the special effects artists brought it all together .