Mission to Fex During the Galactic Civil War , and shortly after the Battle of Yavin , Luke Skywalker went on a mission to the moon Fex with Nakari Kelen and R2 - D2 in order to find the lost collection crew of the Kelen Biolabs and their ship , the " Harvester " , and bring back any interests on the moon to Pasher . The crew found one survivor aboard the " Harvester " and successfully returned with the ship , bringing along dead Fexian skullborer samples . They were paid handsomely from Fayet Kelen to upgrade the " Desert Jewel " in preparation for their mission on Denon . Prelude . When Luke Skywalker engaged Imperial TIE / ln space superiority starfighter s and rescued a Kupohan starship in the Llanic system , it was later known that a member of the Kuphoan spynet was in that ship carrying a vital information for the Rebel Alliance . Apparently , there was a Givin woman named Drusil Bephorin , a cryptographic genius who can slice nearly everything . The Empire was trying to convince her to apply her skills to slice through the Alliance ' s codes , while keeping her imprisoned on the planet Denon . Bephorin smuggled out a message through a Kupohan contact to the Alliance , ensuring that she will assist them if they help her and her family get to Omereth . After receiving the message , Admiral Gial Ackbar and Prince ss Leia Organa agreed to send Skywalker in a mission to liberate the Givin . While the " Millennium Falcon " was not available for the mission , a fast ship that Skywalker could pilot was the " Desert Jewel " , however , the ship was virtually unarmed . Furthermore , because the Alliance wasn ' t on condition to pay credit s for the " Jewel " s weaponry , Skywalker had to gain resources to upgrade by his own . Having a conversation with Nakari Kelen , daughter of Fayet Kelen , who owned the " Desert Jewel " , Skywalker came up with an idea to help her father and get permission to upgrade the ship , as well as the credits . Nakari told Skywalker that her father lost contact with the collection crew he sent to an unexplored moon called Fex located in the Deep Core . She said , if they bring news of the crew ' s whereabouts , they would be able to get the help they need from her father . Admiral Ackbar joined the conversation and gave Skywalker a secondary objective to scout the moon and judge if the place would make an ideal base for the Alliance , since it was an unknown world to the public . Accompanied by R2 - D2 and Nakari Kelen , Skywalker visited Pasher , the planet that Kelen Biolabs was located on . On the planet , Fayet Kelen gladly welcomed them and promised he ' ll compensate after they accomplish their mission to Fex . He ordered his staff to prepare two suits of the new Fexian armor prototypes along with a case of stun stick s , and transferred the coordinates with some additional data of the moon to R2 - D2 . After receiving three black cargo cases containing the equipment , the crew departed Pasher and set course to the Core Worlds to calculate the safest hyperspace route before navigating the Deep Core . The mission . As the crew jumped into hyperspace , a pre - recorded holographic image of Fayet Kelen started briefing of the mission they were assigned . A footage recorded by the scouting crew on the moon played , and revealed that mysterious creatures native to the moon killed the crew by sucking onto their brain s . The Fexian skullborer s , as named by Fayet Kelen , had teeth that were strong enough to penetrate an heavy armor and possessed a unique camouflaging ability which make them nearly invisible when attacking their prey . This ability was temporarily neutralized when they were stun ned however , thus making the Fexian armor and stun sticks reasonable for Skywalker and Kelen . Their primary objective was to confirm if the rest of the collection crew was dead or alive , and report on the condition of their ship , the " Harvester " . As the record winked out , Kelen suggested Skywalker that the Alliance shouldn ' t try to establish a base on the moon , which Skywalker fully agreed . Before making a final jump to Deep Core , the crew spent hours practicing the equipment . They realized that due to the bulky armor , the wearer could barely stand up but takes reduced impact of stun sticks , which would be helpful when the skullborers stuck onto their helmets . After entering Sha Qarot system Kelen sent a signal to activate the " Harvester " s beacon , and spotted the ship resting on Fex . They landed their ship nearby and scanned for life - forms . Scan revealed several life - forms inside the freighter but not enough to make up the entire crew . Skywalker and Kelen ' s attempt to raise them via comm failed , so they had no choice but to investigate in person . The two wore their armor , prepped with stun sticks and blaster s , entered the " Harvester " via ventral airlock . First , they investigated the port side cargo bay with stun sticks ready in case of a surprise attack , finding nothing but a pallet of crates for food supplies . As the two headed towards the aft they found five Fexian skullborers lying unconscious , contained inside the bottom row of ten closet near the aft hatch , seem likely to be dead , while the top containers ' thick polymer glass had been cut through in narrow arcs with uneven edges , implying that there were other five skullborers loose in the ship . As Skywalker wondered why only the top five escaped and the bottom ones didn ' t , Kelen assumed that one of the skullborers on the top figured out how to bore through the glass and the others saw what it did and copied it . Skywalker worried that whether the creatures followed a single leader or acted independently , it meant that they had a level of intelligence he ' d rather not face . Moving on , the two used a console pad for a shipwide announcement to contact any surviving crew members . No response came , making them to open the aft hatch which leads to the rest of the ship . The first sign of the collection crew they found was a dead Cerean lying facedown with two holes on his head , wearing a standard Kelen Biolabs uniform . Kelen discovered a second corpse in a rudimentary machine shop incorporated in the engineering area , someone who was once a scientist she knew . As both entered the lounge in the living quarters , they got their first view of the carnage . Three bodies , a Sullustan male , human female , and a Zabrak male were scattered around the lounge , with each having marks of a skullborer attack . Skywalker opened a door the Zabrak ' s body was blocking to head to the medical bay , and suddenly felt something landing on his helmet , which meant he was ambushed by skullborers . Wielding stun sticks on each hand , Skywalker managed to hit one of the creatures that soon fell off his body . But while trying to get a look on the fainted creature , Skywalker lost his balance and staggered backwards , tripping down to the floor due to his unwieldy armor . Then , two additional skullborers landed on his visor and the bottom one started to drill through his helmet while the other one on top of its back served as a shield , preventing the stun stick from knocking his partner out of consciousness . Realizing that the stun sticks couldn ' t suppress the creatures anymore , Skywalker reached out for his blaster instead and pulled the trigger without bothering to check its setting . The laser blast killed the last attacker , ending the sudden skirmish . Although their mission was to investigate the moon and bring back any interests alive if possible , Nakari even killed the stunned ones in revenge for her dead friends . As Kelen gave Skywalker a hand up , another skullborer appeared out of nowhere and injured her left hand . After quickly firing at the sudden attacker , they realized the skullborers were able to learn by their experience in the fact that the skullborer attacked the weapon hand , implying that they were at least semi - sentient . Skywalker patched Kelen up with a bacta patch , and letted the automated medical system in the medical bay continue . Skywalker resumed his investigation aboard the ship alone , having time to wonder if skullborers get smarter depending on what they ate , presuming that the brain of a Cerean improved their strategy . Skywalker eventually found the sixth and final crew member of the " Harvester " at the living quarters ' third hatch on the left . The member was a human male , and although his look was most likely dead , his skull was still intact . As Skywalker leaned closer , he found out the man was still breathing . He threw the man over his left shoulder and hurried to the medical bay . After taking him to Kelen , Skywalker cleared the ship and started up the " Harvester " s engines and ran preflight . Then he dragged all the victims into the holding area , and double checked the ship with a life - form scanner he fetched when he returned briefly to the " Desert Jewel " . The scanner indicated clear and Skywalker linked the " Harvester " to the " Jewel " s navigation computer and successfully set course to Pasher . Aftermath . When Nakari and Skywalker arrived on Pasher , Fayet Kelen was waiting for them along with his employees . Nakari gave her father a quick summary of events , and Fayet requested Skywalker to delete all the data that he provided to R2 , since he wanted his interests were protected from other beings . Skywalker did what he had been told , however , Nakari winked at him , indicating that she had her own backup of the Fexian coordinates stored somewhere that might come in handy for the Rebel Alliance . Fayet thanked Skywalker for returning his ship and crew , and promised Nakari to be careful before acting further research on the moon . After spending one night at Pasher ' s finest hotel at Fayet ' s expense , Skywalker rejoined with Nakari and planned their next move ; with the funds that Fayet provided , they decided to repaint the " Desert Jewel " to throw off Imperial alert , and outfit the ship with weapons on Rodia . Behind the scenes . The mission to Fex appears in " Heir to the Jedi " , a canon adult novel written by Kevin Hearne and published on March 3 , 2015 . It was one of the main events introduced in the novel .