Mission to Queyta The Mission to Queyta was a quest undertaken by five Jedi Masters to obtain an antidote for the chemical weapon known as swamp gas , used to wipe out the Gungan colony on Ohma - D ' un . The Jedi team consisted of Obi - Wan Kenobi and four nomadic Jedi : the Bothan Knol Ven ' nari , the mysterious Jon Antilles , the renowned emancipator of slaves Nico Diath , and the ancient Jedi master Fay . Their search for the antidote took them to the volcanic world Queyta , where a Separatist chemical factory situated in the lava rivers served as the production facility of the weapon . However , Count Dooku , the head of the Separatist armies , sent his Dark Acolyte Asajj Ventress and the infamous bounty hunter Durge to secure the antidote as well . The factory was manned by Skakoans wearing pressurized suits , which Durge used to cause a massive explosion which engulfed and killed Master Ven ' nari . The massive explosion made the complex unstable , and Master Diath was lost to the lava after being smothered with lava pouring down from the unstable ceiling . Antilles took retribution by holding Durge back while Kenobi and Fay pursued Ventress . Durge overpowered the Jedi and tossed him into the rising lava . Fay and Kenobi confronted Ventress and retrieved the antidote . As they attempted to escape the sinking complex , Ventress recovered and impaled Fay through the back with her twin lightsabers before retreating in Durge ' s ship . During her final moments , Fay granted Kenobi the last of her energy , giving him the ability to escape the sinking complex in time with the antidote . Prelude . When word reached the Jedi of the massacre on Ohma - D ' un , orders went out to locate the source of the chemical weapon . Obi - Wan Kenobi , who had seen first - hand the devastation wrought on the Gungan colony , investigated this new threat , and learned of a secret Separatist chemical plant on the lava world of Queyta . Kenobi was met there by four nomadic Jedi Masters ; Knol Ven ' nari , Nico Diath , Fay , and Jon Antilles — considered to be some of the greatest Masters of the Order , and legends , all . The mission . Although Obi - Wan felt he was out of his league in the presence of such legendary Masters , Fay assured him his experience of the swamp gas would prove invaluable in their mission . The Jedi quickly located the chemical plant : a mobile facility riding the lava flow . Infiltrating the base , the Jedi met no battle droids , only pressure - suited Skakoan sentries and workers . All too soon , a far more potent threat presented itself , in the forms of Separatist Commander Asajj Ventress and the Gen ' Dai mercenary Durge . The battle for the antidote began when Durge fired upon the Skakoan workers , his blasts breaching their pressure suits and causing a huge explosion in the plant . Master Ven ' nari used her Force powers to absorb the fireball ' s energy , at the cost of her own life . Jon Antilles confronted Ventress as she attempted to reach the antidote , but fell when Durge destroyed the bridge he was standing on . Though Antilles survived his fall , Nico Diath was not so lucky . Ventress weakened the ceiling supports above him , sending molten lava raining down onto the Jedi Master . He toppled from the walkway into the lava below . Antilles launched an attack on Durge , but the hulking Gen ' Dai proved stronger . Antilles was thrown into the lava , though he managed to melt the regenerative thug ' s arms before he died . Now the only survivors of the Jedi strike team , Obi - Wan and Fay confronted Ventress , the latter sending shards of metal flying into the Dark Jedi . Ventress fell , but regained her strength while Durge distracted the Jedi . An explosion sent Fay spinning to the ground , where Asajj impaled the Jedi Master on her twin lightsaber blades . Despite the destruction they had caused , Ventress and Durge did not kill Obi - Wan , though Ventress vowed to kill him the next time they met . Fay lent the weakening Obi - Wan the last of her fading strength to make a leap to safe ground with the antidote . Aftermath . Obi - Wan Kenobi , injured and distraught , managed to fly his Jedi starfighter back to the Jedi Temple on Coruscant with the antidote . However , the incident had left him disoriented and he crashed his starfighter into the landing platform during the landing , nearly killing his apprentice Anakin Skywalker and Master Mace Windu . Kenobi was quickly rushed to medical aid , and eventually made a full recovery . A memorial service for the four fallen Jedi . Kenobi passed on the tale of their sacrifice to those attending the memorial , and expressed his distraught over the death of Fay . Master Windu assured Kenobi that through her sacrifice , she had saved millions of innocent lives . Unfortunately , the Galactic Republic had not seen the last of the deadly swamp gas . Unknown to Obi - Wan , a second laboratory had been established on the far side of Queyta , and loaded its creations aboard the science vessel " Gahenna " . This vessel would roam the galaxy for the next two years , modifying the swamp gas weapon to become the Trihexalophine1138 toxin that devastated Honoghr . Behind the scenes . The Jedi mission to recover the antidote from Queyta was first depicted in " " . " The New Essential Chronology " would later give the proper name of " Mission to Queyta " to the event .