World Brain The World Brain , known as pazhkic Yuuzhan ' tar al ' tirrna in Yuuzhan Vong , was a dhuryam tasked with overseeing the Vongforming of Coruscant during the Yuuzhan Vong War . Thirteen dhuryams were bioengineered by Master Shaper Ch ' Gang Hool in 27 ABY , and each were given a domain aboard the Seedship . Using hordes of telepathically - controlled slaves , the dhuryams competed to manage the growth of their domain , knowing that only the most successful dhuryam would be chosen to become the World Brain . The young Jedi Knight Jacen Solo proved a defiant slave to one of the dhuryams , resisting its commands . The stubborn dhuryam vainly began a bitter campaign against Solo , to the detriment of its domain , which fell behind its competitors . Out of necessity , the dhuryam compromised with Solo , allowing him to do as he pleased once it benefited the domain . Solo ultimately helped the dhuryam wipe out its competition , killing its twelve rivals on the day the World Brain was to be selected . Solo also attempted to murder his own dhuryam , only to be foiled by the Yuuzhan Vong ally Vergere . With no other alternative , the Yuuzhan Vong installed the surviving dhuryam in the World - Well on Coruscant , and it began to coordinate the planet ' s terraforming . However , Jacen Solo later convinced the World Brain to intentionally sabotage the project and frustrate the Yuuzhan Vong . The World Brain performed Solo ' s mandate diligently until Supreme Overlord Shimrra brought it into line . When Solo and the Galactic Alliance attacked Coruscant , the World Brain again sided with its old ally , helping to defeat Shimrra . After the war ' s conclusion , the World Brain agreed to help the Galactic Alliance undo the Yuuzhan Vong ' s changes to Coruscant . It was accidentally killed by Alema Rar over ten years later , having left the World - Well for fear of assassination by Bothan anti - Yuuzhan Vong extremists . Biography . The Nursery . After the Yuuzhan Vong species fled their galaxy , they took with them genetic samples of creatures known as dhuryam s from their long lost homeworld , Yuuzhan ' tar , preserving them for millennia . Related to yammosk war coordinators , the dhuryams were fully - sentient telepathic overseers , who could mentally meld many various elements to direct the worldshaping of a planet . In 28 ABY , the Yuuzhan Vong conquered the world of Coruscant in their new galaxy , and wished to terraform it to resemble their erstwhile homeworld ; in order to do this , they needed a dhuryam to act as the planet ' s World Brain and supervise the world ' s transition . Thirteen dhuryams were bioengineered aboard the Seedship that was " en route " to Coruscant with the matériel needed to reshape the planet in Yuuzhan ' tar ' s image . In a process overseen by Master Shaper Ch ' Gang Hool and Executor Nom Anor , the thirteen dhuryams would be placed in the Nursery aboard the Seedship , where each would be given a domain and flocks of slaves to telepathically control . The dhuryams were tasked with coordinating the development of their domains ' ecologies as best they could ; at the end of the process , one dhuryam would be chosen to become the World Brain and the rest would be disposed of . The creatures knew the consequences of failure , so they were desperate to succeed . To prevent them sabotaging each other , Yuuzhan Vong warriors were installed around the lake wherein the dhuryam ' s hive - island was situated . One particular dhuryam had a recalcitrant slave in Jacen Solo , a young Jedi Knight who had been captured by the Yuuzhan Vong at Myrkr . Like every slave controlled by this dhuryam , Solo had a Yorik - Kul implanted in his body , which allowed the dhuryam to cause him intense pain as it pleased , until he carried out the task desired by the creature . However , unlike the other submissive slaves , Solo refused to acquiesce to the dhuryam ' s commands , instead enduring the pain . Solo ' s stubborn master began an embittered conflict with its defiant slave , causing the young Jedi endless pain for several days in succession . When it realized this had no effect on Solo , the dhuryam used the implants to manipulate Solo ' s body into jerking spasms , but could still not control him fully . However , the dhuryam had expended so much of its attention on the vendetta against Solo that other duties were neglected , and its dominion fell into a state of disrepair , becoming the least cultivated of the thirteen domains . Belatedly realizing this , the dhuryam made a tacit pact with Solo , allowing him to do what he wished as long as it did not hinder the development of the dhuryam ' s domain . As it happened , Solo ' s medical assistance to injured slaves gave the dhuryam a more industrious workforce , and the domain began to flourish , becoming a lush and teeming expanse of land . In Solo ' s opinion , it had overtaken its rivals and his dhuryam was the most worthy of selection . The dhuryam and Solo , once fierce enemies , began to develop a rapport . As it could not communicate with Solo via language , the pain from the Yorik - Kul was the only means of communicating with Solo : the creature sent him occasional twangs of affection and encouragement , directing the young Jedi towards medicinal flora to help him in his role as the domain ' s medic , and providing him with other slaves to act as his assistants . However , occasional tension did surface ; when Solo began treating injured slaves belonging to the dhuryam ' s rivals , his master resuming its conflict with him for a day , but Solo refused to give in . Their bond strengthened after this , until Solo could convey images and emotions to the dhuryam , and vice versa . Day of reckoning . On the eve of the " tizo ' pil Yun ' tchilat " — the ceremony by which the triumphant dhuryam was selected — Solo and the dhuryam came to another agreement : Solo would kill the rival dhuryams if , after it was selected as World Brain , his own dhuryam would ensure the survival of the thousands of slaves aboard the Seedship when the seedfall onto Coruscant occurred . Hidden caches of rudimentary weapons were furtively stored up in the domain for the slaves to use during the attack on the rival dhuryams . When the selection ceremony began , a shreeyam ' tiz was taken to the Nursery to disrupt the dhuryams ' telepathic links with their slaves — this was to prevent any eleventh - hour sabotage the dhuryams might have planned . However , Solo ' s dhuryam had faith in the Jedi ' s ability to perform his duty . Effectively blind and deaf , the twelve other dhuryams waited in fear and worry , desperately hoping they would awake as the newly chosen World Brain . Solo ' s dhuryam , however , waited in anticipation , ready to strike when Solo disabled the shreeyam ' tiz . The shreeyam ' tiz used the Yorik - Kul implants to conveniently gather the slaves around the coraltree basal of their respective domain while teams of Yuuzhan Vong shapers and warriors assessed the work of each dhuryam . Solo defied the Yorik - Kul ' s pain to resist , and , using his newly - discovered Vongsense to utilize the various creatures of the Nursery as weapons , attacked the shreeyam ' tiz and its assignment of guards . When Solo killed the shreeyam ' tiz , each dhuryam was reconnected with their slave - links . While his brethren were disoriented by this unexpected awakening and the disarray Solo had caused in the Nursery , Solo ' s own dhuryam quickly organized and armed swaths of its slaves with the hidden weapons . Sacworm s filled with sparkbee honey were used as incendiary grenades ; before long , the entire Nursery was thrown into a state of chaos , as Yuuzhan Vong warriors clashed with hordes of slaves . The other dhuryams called their slaves to the hive - island to defend them , but Solo ' s dhuryam sent out armed slaves in teams of five to create further distractions while Solo and his own team moved towards the hive - island . Solo murdered each and every of the rival dhuryams , before moving on to his own one with bloodthirsty intentions ; the dhuryam , so used to compliance it was unfamiliar with the concept of betrayal , had not expected this and was totally defenseless . Just before he could strike a fatal blow , Solo was faced with the Fosh Vergere . A former Jedi - cum - Yuuzhan Vong ally , she had acted as Solo ' s unwanted mentor aboard the Seedship . Vergere attempted to dissuade Solo against killing his friend , but Solo , hoping to ruin the Yuuzhan Vong ' s projects to Vongform Coruscant , decided to slay the dhuryam regardless . Vergere was forced to intercede and paralyze him . The dhuryam had survived the Nursery , unlike his fellows , and had to be chosen as the World Brain . The panicked Shapers gave immediate control of the Seedship to the surviving dhuryam in a desperate attempt to retrieve the situation . It was pronounced as World Brain of the new Yuuzhan ' tar — " Pazhkic Yuuzhan ' tar al ' tirrna " in Yuuzhan Vong — with little pomp or ceremony . The new World Brain quickly broke off much of the Seedship as it neared Coruscant , sending each piece down to the planet to sprout and spread the various Vongforming seeds . Despite Jacen Solo ' s botched attempt at betrayal , the dhuryam kept up its side of the bargain , ferrying the slaves planetside on the individual seedships before the Yuuzhan Vong could have them executed . The immobile dhuryam was installed in the Well of the World Brain on Coruscant , in what used to be the Senate Building . The World Brain was located at the heart of mountain of impenetrable wall of yorik coral that had enveloped the existing building , resilient to concussion missiles and orbital bombardment : the Yuuzhan Vong claimed that only planetary destruction could kill the World Brain . Aside from Nom Anor and Ch ' Gang Hool , only a select few were allowed to enter the well . The World Brain worked quickly in Vongforming the urban metropolis of Coruscant , replacing it with organic Yuuzhan Vong constructs . The World Brain was privy to a constant flow of information from every part of the planet which , along with its own judgment , it used to discern what steps were to be taken . Despite Ch ' Gang Hool ' s claims that he was in charge , in truth the dhuryam controlled Coruscant , creating the new planet ' s topography as it desired . Agent of Chaos . Jacen Solo was on Coruscant , and had claimed to have defected to the Yuuzhan Vong and converted to their religion , but the Yuuzhan Vong refused to allow him access to the World - Well . Solo was presented with a pretext for entering the World Brain ' s home when the Yuuzhan Vong held a huge ceremony outside the former Senate Building , during which Solo claimed he would sacrifice his fellow Jedi Ganner Rhysode , a captive of the Yuuzhan Vong . Instead , Solo and Rhysode stole into the World - Well and sealed it off from any pursuers . While Rhysode fended off the eventual Yuuzhan Vong attacks , Solo made to communicate with the World Brain . The dhuryam enveloped Solo in its many tentacles , drawing him close and baring its fangs ; it had not forgotten his betrayal . Solo used their connection to send his compassion and understanding to his friend , emphasizing their bond and claiming that if one killed the other , they would be killing part of themselves . The World Brain listened to Solo , as he incited it to conspire against the Yuuzhan Vong . Rather than working directly against the Yuuzhan Vong , Solo wanted his friend to ensure that the Vongforming process on Coruscant was fraught with persistent glitches and minor setbacks . The Yuuzhan Vong , with neither the time nor resources to replace the World Brain , would have to learn lessons in compromising and adapting . The World Brain , having forgiven Solo ' s betrayal , agreed ; Solo fled Coruscant with Vergere . The World Brain remained in telepathic contact with Solo , even though the young Jedi was offplanet . It carried out its new mandate dutifully , creating an itching plague , which affected all of a Yuuzhan Vong ' s skin and spread quickly , until nearly every Yuuzhan Vong on Coruscant was affected . Although Yuuzhan Vong custom decreed that they should merely ignore the discomfort , many members of the Elite succumbed to the plague ' s stresses . The plague was first noticed on the day of Supreme Overlord Shimrra ' s arrival on the planet , adding to the Yuuzhan Vong ' s chagrin . An anti - fungal balm was eventually developed by Shaper Nen Yim , though it could only kill the fungus on contact and there was a high chance of re - infection ; the plague was still ubiquitous on Coruscant for over a year . The World Brain also looked out for specific times of importance to the Yuuzhan Vong , and sought to sabotage them . Hundreds of high - profile captives were scheduled to be executed in a ceremony at the Square of Sacrifice attended by Shimrra , Warmaster Tsavong Lah and Most High Priest Jakan , but the World Brain ruined it . It made the maw luur that digested the area ' s sewage regurgitate all of the pestilent fluid into the square , repulsing the Yuuzhan Vong and curtailing the ceremony . The World Brain sabotaged several more ceremonies in the same fashion . Harvesting was disrupted by the overheating of lambent crystals , which caused fires . Defective lungworm s began to emit harmful hydrogen sulfide instead of oxygen . Several times the World Brain had flocks of transport enveloper s abscond for a time , causing panic among their carers . It engineered a surplus population of stink - beetle s , which splattered into many Coruscant ' s newly - Vongformed buildings . The dhuryam had become the Yuuzhan Vong ' s bane , creating discord on Coruscant . The malfunctioning Vongforming process contributed to the disillusionment suffered by many low - ranking Yuuzhan Vong , and to the " Jeedai " heresy that followed . It was assumed that the World Brain suffered from some sort of illness . Ch ' Gang Hool was held responsible and executed , but his replacement , Yal Phaath , could do nothing to halt the onset of problems created by the World Brain , and he himself was soon replaced by Qelah Kwaad . A team of shapers was tasked with bringing the dhuryam into line , to little effect , and the shapers came under increasing pressure from an irate Shimrra . The situation was so desperate that the priest Harrar postulated that Shimrra may have engineered the " Jeedai " heresy crisis and the emergence of the dissident prophet Yu ' shaa to distract from the World Brain ' s failures , although this was not the case . Solo opted to continue the small scale disruption he and the World Brain had planned ; his compassion for the Yuuzhan Vong prevented more drastic action . Realignment and reunion . Jacen Solo had a rival for the World Brain ' s attention in Shimrra , the Supreme Overlord , with whom it was in direct contact . Shimrra came to regard the dhuryam as a sort of unruly child , one he could influence but not fully control . Slowly , he was able to assuage the World Brain more and more ; eventually several sacrificial ceremonies were conducted without incident . The Vongforming of the planet progressed significantly , and the Yuuzhan Vong began to warily trust the dhuryam . Nom Anor suspected that Shimrra was merely tricking the World Brain , making it think that it was necessary for the planet ' s development that the maw luur retained the sewage . In truth , Jacen Solo was in the Unknown Regions ; so far from Coruscant , his link with the dhuryam dwindled and eventually disappeared allowing Shimrra to influence the dhuryam until , by 29 ABY , it firmly under Shimrra ' s thumb . Soon after the World Brain acquiesced to Shimrra , the sentient , mobile planet Zonama Sekot arrived in the Coruscant system , altering Coruscant ' s orbit and causing volcanic eruptions and groundquakes . Galactic Alliance forces — including Jacen Solo — subsequently launched an attack on the planet . Shimrra had the World Brain set Coruscant ablaze to deter any attempts to occupy the world , convincing the dhuryam that in doing so , it was preventing the damage caused by Zonama Sekot ' s close passage . However , the brain became embroiled in an internal turmoil , as it was damaging all that it had created and reneging on its agreement with Solo to disrupt the planet ' s development in moderation . It considered simply ignoring Shimrra ' s commands and rectifying the situation itself , but having become so used to working with a partner , the dhuryam was unable to break free from the Supreme Overlord ' s influence . The World Brain was saved from its mental anguish by the arrival of Jacen Solo on Coruscant and the reignition of their bond . So distracted by the bedlam on Coruscant , the World Brain did not initially notice Solo ' s presence . When it did , the dhuryam pleaded desperately for some constructive course of action to take , and Solo pledged to help it . He began to coax his friend into siding with the New Republic against Shimrra , but the dhuryam was difficult to persuade . Solo ' s parents Han Solo and Leia Organa Solo arrived in the World - Well with the turncoat Yuuzhan Vong priest Harrar and forced Master Shaper Qelah Kwaad to attempt to placate and communicate with the dhuryam . Kwaad , not knowing of Solo ' s contact with the dhuryam , assumed only Shimrra could communicate with it , but endeavored to try . Before she could , the dhuryam , in constant contact with Solo , made its mind up , siding with Solo against Shimrra . It reigned in the Tu - Scart and Sgauru biots which were halting Solo ' s path to Shimrra ' s Citadel . The World Brain had Tu - Scart and Sgauru assist Solo and his cohorts in reaching the Citadel , and shook the building ' s foundations . Like the " Jeedai " heretics , the World Brain had begun revolting against its Yuuzhan Vong masters . Luke Skywalker killed Shimrra and Solo killed his puppet - master , Onimi , and the Sekot Accords brought the war to the end . During the discussions between Yuuzhan Vong Warmaster Nas Choka and Galactic Alliance Admiral Traest Kre ' fey , the issue of the World Brain was raised . Kre ' fey petitioned Choka to order Yuuzhan Vong shapers to persuade the dhuryam to undo some of the Vongforming and help return Coruscant to its previous state . Kre ' fey had no qualms about retaining the World Brain ' s presence on Coruscant , seeing it as a symbol of compromise . The dhuryam was initially reticent about altering the work it had done , but Jacen Solo interceded and won over his friend . Demise . The World Brain performed as agreed on Galactic Alliance - controlled Coruscant , reversing much of the Vongforming process . However , remnants of the Yuuzhan Vong ' s biological alterations to the world still remained in 40 ABY , over a decade after the Sekot Accords . Unfamiliar with such a foreign creature , some Coruscanti saw the World Brain that resided on their homeworld as a beast . Solo maintained infrequent visits , sometimes years apart , to see his friend . The dhuryam established telepathic connections with some of the savages of the Coruscant underworld , known as Ferals , who performed the World Brain ' s bidding . When Solo became head of the Galactic Alliance Guard , a newly formed secret police , he augmented his own spy network with the World Brain and its Ferals . Before long , Solo ' s old friend and its allies was providing him directly with far more intelligence than any of the GAG ' s other assets . During the Second Corellian Insurrection in 40 ABY , Solo had the World Brain spy on Corellian terrorist cells on Coruscant . At the same time as the Corellian crisis , a group of Bothans formed the True Victory Party , which advocated circumventing the Sekot Accords to resume the Bothan species ' genocidal war against the Yuuzhan Vong . The remaining Yuuzhan Vong had been relocated to Zonama Sekot in the Unknown Regions after the war ' s end , so the World Brain was one of the Bothans ' prime targets , and the dhuryam knew this . It grew increasingly paranoid about the Bothan threat , until it eventually left the World - Well of its own volition , relocating in the heart of Coruscant ' s underworld . Here , the dhuryam was constantly surrounded by its Ferals , becoming known by the sobriquet " It . " The World Brain continued to supply Solo with information regarding the Corellians , but shortly after its relocation Solo paid a furtive visit to his old friend . The dhuryam was deeply concerned about its safety , and Solo ' s claims that he had the situation under control helped little . Their meeting was fraught with tension ; Solo was angry with the dhuryam for leaving the World - Well , while the dhuryam wanted Solo to expel all Bothans from Coruscant , something he could not do . The dhuryam suspected that Solo had been followed , and its telepathy indicated that there was an assassin in the building . In truth , it wasn ' t a Bothan , but Alema Rar , formerly of the New Jedi Order , who planned to kill Solo to avenge Rar ' s grievances with Solo ' s mother Leia . Rar used a blowgun to fire a poisoned dart at Jacen Solo , but the Dark Lady of the Sith Lumiya , who had also been trailing Solo , Force pushed him out of the dart ' s path : instead , it struck the World Brain ' s huge eye , sending the dhuryam into frenzied convulsions . Rar fled , and Solo — distraught and furious at his friend ' s pain — was only prevented from giving chase by Lumiya , who insisted they do what they could to help the dhuryam . The poison proved fatal , however : the dosage was enough to kill a Human within minutes , but the much larger World Brain suffered a more protracted agony , before finally succumbing to the dart ' s toxins . The Ferals , lacking the impulse control provided by the World Brain , began to riot . Solo was dismayed , and , believing the True Victory Party responsible for the loss of his friend , began a bloodthirsty vendetta against suspected members of the party with a string of assassinations against Bothan politicians on Coruscant . Ultimately , the World Brain ' s death contributed towards Solo ' s spiral towards becoming Darth Caedus , Sith Lord . Behind the scenes . The character of the World Brain was created by Matthew Stover for 2002 ' s " " , part of " " series of novels . The World Brain featured prominently in Part One of the novel , before reappearing briefly in Part Three . It was subsequently mentioned in several later works in " The New Jedi Order " , before appearing in the series ' final installment , James Luceno ' s " " , in 2003 . It also played a minor role in the subsequent " Legacy of the Force " series , receiving brief mention in Aaron Allston ' s " " and Karen Traviss ' s " " , both in 2006 . Troy Denning featured the character in the opening chapter of " " ( 2006 ) , killing it off . Allston again referenced the character briefly in " " , published in 2007 .