Tedryn Holocron The Tedryn Holocron , also known as Vodo - Siosk Baas ' s holocron , was an important Jedi holocron created over four thousand years before the Battle of Yavin by Jedi Master Tedryn . Properties . The Tedryn Holocron was a glowing cube that sat comfortably in the palm of the hand . It was a milky jade crystal block with ancient writings on its smooth surface . The Jedi teaching device was an interactive wisdom source , that combined ancient organic crystalline formations and hardware . Its metal parts were embossed with curious designs suggesting great antiquity . The inner crystals sensed the affiliation of the Force - user to the light side , though any Force - talented user could activate the holocron by touching the design on its side . The holocron produced a primitive green - tinted hologram of its primary gatekeeper . The knowledge contained in the holocron could be accessed by anyone to a certain extent . On the most superficial level the holocron was merely a recording device , a collection of records with interactive holograms of the authors . The basic knowledge in the holocron could be accessed directly , like a computer encyclopedia , or by interfacing with the current gatekeeper . However , the greatest portion of the wisdom could be unlocked only by a Jedi . The inner organic crystals were the key to the deeper levels of knowledge . Not even a Sith Lord — like Emperor Palpatine who possessed the device for thirty years — had the power to reach its restricted information . Deeper teachings and accounts were relayed directly by the Masters who added them to the holocron . The Tedryn Holocron was tailored toward helping Jedi Masters penetrate the secrets of the Force . Even beings already trained in the Jedi ways benefit greatly from such a source of learning . Gatekeepers . The gatekeeper was a Jedi Master ' s holographic simulation that worked as a search and recovery engine built in every holocron . The fact that one gatekeeper relayed certain information was not an indicator that this information had been recorded by that particular gatekeeper , as the data contained within the holocron could be accessed by all gatekeepers . Originally , the holocron was named after Tedryn , but later often was referred to as simply the Jedi Holocron , or Bodo Baas ' s holocron . The New Jedi Order called it the Tedryn Holocron to avoid confusion over Vodo - Siosk Baas and Bodo Baas , and also to honor their predecessor . In all probability , Tedryn was the creator and first gatekeeper of the holocron . At some point before the Great Sith War , Jedi Master Odan - Urr , one of the early gatekeepers , added a record to the holocron about the Great Hyperspace War . The Tedryn Holocron eventually passed to Vodo - Siosk Baas , a Krevaaki Jedi Master and Jedi historian . In 3997 BBY , his hologram introduced the recent history of the Sith , including Naga Sadow and Freedon Nadd to Exar Kun Vodo ' s hologram introduced Exar Kun , Ulic Qel - Droma and the Great Sith War to the students of Luke Skywalker more than four thousand years after his death . Later Luke asked Baas about the fate of Exar Kun , and the gatekeeper told him that Kun slew his own master , Vodo himself , when the latter tried to bring his apprentice back from the dark side . Vodo - Siosk Baas was the last invoked gatekeeper , because the spirit of Kun destroyed the holocron before Baas could reveal Exar ' s fate to Skywalker . An auxiliary gatekeeper told stories of intrigues in the Galactic Republic to the apprentices of Skywalker . before an other gatekeeper spoke of Luke how the young Yoda became a Jedi . Tha last gatekeeper of the Holocron was Bodo Baas , a descendant of Vodo - Siosk Baas . His hologram explained a partial story of Ulic - Qel Droma , a brief description of the dark side , and the prophecy written by Baas ' master . Later Baas suggested that ancient Jedi artifacts may be found on Ossus , an old Jedi teaching center , and that they could find survivors of the Great Jedi Purge . Later , in the Jedi Praxeum , Luke asked Baas to explain the power classified as Alter Mind to Corran Horn in the apprentice ' s chamber . Contents . According to Obi - Wan Kenobi , the Tedryn Holocron contained thousand - year - old secrets and the some of the most secret Jedi history and teachings . It held information about the origins of the Jedi and the Sith and their earliest conflicts . Vodo - Siosk Baas made a recording about the war known as the Hundred - Year Darkness , in which he spoke of the First Great Schism , dark side - mutant mounts and creatures , like Leviathans , and the final confrontation on Corbos . By the time of the recording the Jedi Order learned that the exiled dark Jedi had conquered the Sith species on Korriban , and Ajunta Pall had formed an Empire . Sometime after 5 , 000 BBY , Master Odan - Urr asked Jori Daragon , Anavus Svag and the Dark Holocron about the Great Hyperspace War , before making a record to preserve the full story of the war for the Jedi Order . In the record he spoke of hyperspace explorers Gav and Jori Daragon of the Koros system meeting the descendants of the Exiles , who became Dark Lords of the Sith Empire . Odan - Urr spoke of Naga Sadow launching an assault using illusions to frighten off the Republic troops . Once the Sith were defeated , Odan - Urr recovered the Dark Holocron from a ship and got to know Sadow ' s escape . At some point before the Great Sith War , when he was around a thousand years old , Ood Bnar recorded his prophecies in the holocron . The device also contained information about Ood Bnar himself , the Neti species and the Ryyk planet . Vodo - Siosk Baas ' s hologram spoke of the battles of Empress Teta and Deneba . < noinclude > Arca Jeth made a record about the Freedon Nadd Uprising , in which he spoke of Freedon Nadd and his heirs , King Ommin and Queen Amanoa , and of Jeth ' s students : Tott Doneeta , Ulic and Cay Qel - Droma . Jeth noted , that Nadd gave his support to the founders of the Krath : Satal and Aleema Keto . According to Bodo Baas , three Jedi Knights tried to conquer the dark side by learning its secrets , but all three of them perished . Vodo - Siosk Baas made a record about the Great Sith War , caused by Exar Kun and Ulic Qel - Droma . Bodo Baas retold the saga of Ulic Qel - Droma to Leia Organa Solo , but for an unknown reason , with some differences . c . 1 , 010 BBY Jedi Master Pernicar about Wud Mortull , the New Sith Wars and the Sith lightsaber 580 BBY Bodo Baas about the Zeison Sha 580 BBY Bodo Baas about the Matukai < noinclude > before 796 BBY Rekpa De ' s many statement on lightsaber duels < noinclude > History . Early history . The Holocron was created sometimes before the Great Sith War , possibly by Jedi Master Tedryn , whom the artifact was named for . Tedryn was probably the first gatekeeper of the holocron and was followed by a long line of Jedi who contributed to the Holocron . One of the early gatekeepers was Master Odan - Urr , who added a record to the holocron about the Great Hyperspace War . One other gatekeeper was the then thousand years old Ood Bnar , who recorded his prophecies in the Holocron . By 3997 BBY Vodo - Siosk Baas held the Holocron and became a gatekeeper by imparting it with his knowledge and memory . One day , he found his Apprentice , Exar Kun questioning the holocron about dark Jedi Freedon Nadd and the Sith , a dark side cult . Baas turned off the device , because the hidden knowledge of the dark side was meant only for Jedi Masters . Around 600 BBY , Bodo Baas inherited the Holocron and reorganized every single recording . By 590 BBY , using primitive hologram technology , he added the records of teachings and history of the Jedi , which was collected by a group of Jedi in the Adega system . The Holocron was believed to have gone missing sometimes before 290 BBY , but it was in the possession of Ashka Boda . Imperial Period . In 19 BBY , at the beginning of the Great Jedi Purge , Emperor Palpatine ' s agents brought Jedi Masters before him to be questioned and tortured for forgotten secrets and cures , that could help him in his quest for immortality . The Tedryn Holocron was among the belongings of Bodo Baas , who was executed by the Emperor . Shortly thereafter the device came in the possession of Master Ashka Boda . The Dark Lord executed Boda as well , and took possession of the Tedryn Holocron . Palpatine used the secrets in the holocron to cheat death with the dark side and cloning technology , and he recorded some of the holocron ' s secrets in his " Book of Anger " . However , the greater portion of the ancient knowledge remained hidden from the Dark Lord , because it was accessible only by Jedi Knights . He considered the Holocron to be only a collection of ancient record . The reborn Emperor held the artifact in his study in the Imperial Citadel on Byss . At some later time , Obi - Wan Kenobi described the Holocron to his apprentice , Luke Skywalker . Kenobi thought the holocron could help reestablish the Jedi Order . Rediscovery for the New Jedi Order . In 10 ABY , Leia Organa Solo was captured by the reborn Emperor on his throneworld , Byss . The Sith Lord showed his holocron to the Jedi , trying unsuccessfully to turn her to the dark side . Leia managed to flee with the holocron . Onboard the " Millennium Falcon " she listened to Bodo Baas ' s version of the downfall of Ulic Qel - Droma , and wondered whether there was hope for Luke , or he had gone too far in the dark side in his effort to conquer it from within . After the battle of Mon Calamari , Leia returned to Pinnacle Base , where she again accessed the holocron . She asked Master Baas about her brother ' s future , but the gatekeeper answered that he could not tell because Skywalker ' s future was obscured . He then recounted a prophecy written by his own Master . Moments later , a fleet of Star Destroyers led by the " Eclipse " dropped out of hyperspace above the Pinnacle Moon . The reborn Emperor demanded that Leia and the Tedryn Holocron be delivered to him ; he would discuss a truce if the Rebels complied . Leia accepted his terms , but left the holocron in her chambers . Aboard the " Eclipse " , she realized that Palpatine ' s hold over Luke had become too strong , and that the dark side was consuming him . The siblings dueled until Leia managed to break Palpatine ' s spell over Luke , and they confronted the Dark Lord together , fulfilling Bodo Baas ' s ancient prophecy . Later , Luke found clues in the Tedryn Holocron indicating possible survivors of the Jedi Purge . He spent many standard weeks searching for Jedi , until eventually , he found Dark Jedi Kam Solusar on the Space City of Nespis VIII . Meanwhile , Leia spent long hours with the Tedryn Holocron while Luke was away . During one such session , Baas told her that Vima - Da - Boda could help them . Luke learned from the Holocron that ancient Jedi artifacts were possibly located on Ossus . His new ally Kam Solusar was rather unimpressed with the small cube , but he was taken aback when it sensed him and activated . The image of Baas gave some cryptic wisdom , and instructed Kam and his fellow Jedi to have patience . Skywalker and Solusar traveled to Ossus , where they med Ood Bnar , an hibernating Jedi Master from Exar Kun ' s time , whose prophecies are stored in the Holocron . With the help of the native Ysanna , the Jedi found a Jedi library that had remained undisturbed for four thousand years . By 11 ABY , the Tedryn Holocron was kept in a small library , where Luke Skywalker ' s apprentices could study it . Skywalker gathered his twelve students in the grand audience chamber of the Massassi temple on Yavin 4 for a formal opening of the Jedi Praxeum . He invoked gatekeeper Vodo - Siosk Baas to impart a teaching to his apprentices . The ancient Krevaaki Jedi Master spoke of the Great Sith War , and of Exar Kun and Ulic - Qel Droma , and he warned the students to beware of the temptations of conquest . Tionne Solusar studied Jedi history from the holocron in the month after arriving to the Praxeum , transcribing its data to tapes and holograms , with a sense of urgency . Her studies allowed her to help the other students with historical examples when the instructions of Master Skywalker were not clear enough . After Gantoris constructed a lightsaber , Corran Horn suspected that he had learned how from the Tedryn Holocron , but Luke explained to him that an inbuilt restriction mechanism prevented the user from accessing knowledge for which he or she is not ready . After the death of Gantoris , Horn advised Master Skywalker on repeating the historical lessons of the Holocron to the students so as to instill a sense of history and purpose to the students , and make them less vulnerable for the corruption of the dark side . Bodo Baas spoke to the Jedi hopefuls about the heroic adventures of ancient Jedi Knights and about their battles against the dark side . Corran Horn tried to get some information about the murder of Gantoris , and Baas explained to him that , at the height of the Sith Wars , Yavin 4 had been the seat of Sith Lord Exar Kun . Kun enslaved the Massassi and forced them to build temples in the jungle , as Naga Sadow had done before . Eventually , the Dark Lord was killed in a Jedi attack . An auxiliary gatekeeper told the students stories of court intrigue in the Old Republic without specifying the subjects of his tales . After Corran Horn and Tionne had accessed all the information concerning Exar Kun , Luke tried to access the deeper levels of the device , but the spirit of the Dark Lord , who had been imprisoned on Yavin 4 since his death four millennia earlier , interrupted Vodo - Siosk Baas by destroying the Holocron . Transcripts and copied data collected by Tionne Solusar and stored in the new Jedi library on Ossus , kept the teachings of the Tedryn Holocron alive after its destruction . Behind the scenes . The " Cult Encounters of the Star Wars Universe " RPG article of a cancelled Star Wars Gamer issue was to be include some brief dialogue between Luke and Bodo Baas from the Holocron in The Order of the Terrible Glare portion , but it wasn ' t published .