Editing Genius The Transgression/Chapter Four:Special Rules and Systems (section)

==== Autocthon, Vulcan, Planet X, and Nemesis: ====

These elusive worlds did not last long enough in the scientific eye to generate enough Mania to exist fully, but occasionally they flicker into existence. Little is known about them, as every time they appear, they seem subtly or completely different. Autocthon (the alternate Earth on the far side of the Sun), Vulcan (the world closer to the Sun than Mercury), Planet X (a possibly rogue planet beyond the asteroid belt), and Nemesis (a world―sometimes a brown dwarf or black hole―at the edge of the solar system trailed by deadly comets) flicker into existence just long enough, usually, to capture a passing rocketship and seek to drain it of its Mania. Should one of these worlds succeed, it might become fully solid.