Myyydril Caverns The Myyydril Caverns were a huge system of subterranean caves located northwest of the town of Kachirho on the Wookiee homeworld Kashyyyk . It was populated by many dangerous beasts , but was also the home of an exiled tribe of Wookiees and several other refugees . The deepest parts of the caverns were the site where mad scientist Treun Lorn built the cyborg abomination N - K Necrosis from the remains of Separatist commander General Grievous . In the years leading to the Battle of Yavin , a new dangerous species of creatures , called Urnsor ' is by the local Wookiees , started to spread in the caverns and slowly decimated the Myyydril tribe . In 1 ABY several adventurers visited the caverns , helping the local Wookiees and Chief Kerritamba with important tasks . One of these adventurers succeeded in ending the Urnsor ' is pest . Around the same time , a group of spacers ventured to the deepest parts of the caverns and killed N - K Necrosis and his NK - 3 guards . Inhabitants . Although the caverns were a very dangerous place , several groups of beings called it their home . The biggest and predominant group was the Myyydril tribe , a clan of friendly Wookiees . Outcast from the Kerritamba Village many years before the Galactic Civil War , they had found a new home in a large cave in this cavern system . Here they had found everything they needed to survive : fresh water in abundance , Uwari beetle s that could be harvested for meat and hide , Luilris mushroom s that were a good source of food , and even Nak ' tra crystal s that could be used to craft energy weapons . During the time of the Galactic Civil War , several other beings had found a home in the Myyydril community , including the Twi ' lek nurse Yraka Nes , smuggler " Shady " Pers and the mysterious Tulgah shaman Echrhin Isdan . They all lived in simple wooden huts in the Myyyydril village , safely guarded by numerous Wookiee guards . Deeper down in the caverns lived a group of refugees under the lead of Ren ' Salla . It is not known who they were hiding from and how they survived down there . They were a very reclusive group and did not trust strangers . An unknown number of adventurers visited the caverns over time . Remains of the most unfortunate ones among these adventurers were sometimes found in the stomachs of killed Uwari beetles and Urnsor ' is . Flora and fauna . Only few plants managed to prosper in this environment . In the upper , drier parts of the caverns the tall White Sinthis ( which grew only in caves ) sprouted from the sandy ground . Its most common companion was the parasitic Warl Cave Plant . The nectar of the Warl Cave plant was used by the Myyydril to brew a strong alcoholic beverage called Warl Surprise . In the caves beyond the mushroom gardens - in the caves surrounding the Myyydril village and beyond in the Deep Depth - only a few mushrooms species seemed to be able to thrive . Despite the existence of water and light from the Nak ' tra crystals and Luilris mushrooms , no other plants could be found down there , possibly due to the Urnsor ' is infestation . Animal life in the caverns was pretty scarce too . Only two animal species had been discovered to have lived in the caverns : the Uwari beetles and the Urnsor ' is . The Myyydril raised and harvested domestic Uwari beetles for their meat , but also kept them as pets . They were kept in a huge cave , guarded by Myyydril herders , until they were big and old enough . Some Uwari beetles that managed to escape the herders lived in the upper levels of the caverns where they sometimes fed on the Luilris Mushrooms grown by the Myyydril . To protect the mushrooms , the Myyydril tried to keep the population of wild Uwari beetles as low as possible . One exceptionally fierce Uwari beetle called Deathswarm lived in the upper parts of the caverns . The Deep Depths were dominated by the other species , the fearsome Urnsor ' is , until the infestation was eliminated by a spacer in 1 , 5 ABY . Behind the scenes . The Myyydril Caverns were introduced in " Rage of the Wookiees " ( 2005 ) , the second expansion of Sony Online Entertainment ' s MMORPG " Star Wars Galaxies " . They were designed by Janessa Johannsson who also designed the surrounding Kkowir Forest area . It was later mentioned in the article " " and its online supplement " " by Abel G . Peña , that included the origins of N - K Necrosis and its defeat . The caverns are an where several quest lines take place , including several quests for the inhabitants of the Myyydril village , one for Chief Kerritamba and the quest to destroy the boss enemy N - K Necrosis . At the time of its release the caverns were designed to be a quest area for high - level player groups , but after the maximum player level was raised with the release of the third expansion ( " Trials of Obi - Wan " ) , most enemies are no longer a challenge for maximum - level players . Concept artworks of the Myyydril Caverns and its inhabitants were published on the bonus DVD - ROM of " " in 2006 .