Nerve toxins represented a form of toxic gas that was weaponized. During the High Republic Era, the Nihil, a band of lawless pirates, employed such gases like nerve toxins in their assaults, safeguarding themselves with breath masks. Lourna Dee, the Tempest Runner, made use of a unique toxin concocted specifically for her by a poisoner located on Nar Shaddaa; she concealed its existence from the other Tempests.