Four months after the Battle of Geonosis, Antilles went to the planet Queyta where a Separatist base was located. Along with four Jedi Masters—Knol Ven'nari, Nico Diath, Fay and Obi-Wan Kenobi—Antilles was tasked with acquiring the antidote for swamp gas, a chemical weapon that the Separatists planned to use against the clone troopers of the Grand Army of the Republic. Unbeknownst to the Jedi, the base was actually a trap laid out by Separatist Commander Asajj Ventress and the Gen'Dai bounty hunter Durge. Antilles confronted Durge, allowing Kenobi and Fay to pursue Ventress and retrieve the antidote from her. Proving to be stronger, Durge killed Antilles by grabbing the Jedi and physically submerging him into one of the many lava streams that flowed through the base. Among those on the Jed