The Plague of New Germania was a virus developed by the Styx. It killed all mammals, including humans and Styx. The virus was stolen from The Laboratories by Drake before they were destroyed. Drake's immunologist friend Charlie weaponized it, making it transmittable by air in addition to direct contact. It was only used once, accidentally, in the Garden of the Second Sun, where it caused an ecological catastrophe and wiped out the civilization of New Germania and the "Bushmen." - Drake