Swamp Gas
this was the code name used by Durge to describe the chemical weapon unleashed by the Separatists on the moon of Ohma-D'un, shortly after the Battle of Geonosis. The thick, green, gaseous substance was highly corrosive, eating away at the skin while destroying lung tissue when it was breathed. Durge and Asajj Ventress had been sent to the system to use the swamp gas on the planet Naboo, but the heroic efforts of Obi-Wan Kenobi, Anakin Skywalker, and Zule prevented them from unleashing the chemical weapon. Shortly after recovering from his wounds, Obi-Wan set out with four other Jedi Masters to obtain the antidote to the swamp gas, in case the Separatists ever tried to use it again. Of the group - which included Knol Ven'nari, Jon Antilles, Nico Diath, and Fay - only Obi-Wan survived to return the antidote to the Jedi Temple on Coruscant.