Since the Fracture, the fates of humans and demons have been inextricably tied to those of Syndesia and Tartaros. As punishment for having plunged Elysium into chaos, the two new planets have been designed to orbit each other around a common barycenter, giving birth to what in astronomy is known as a binary system. This peculiar structure leads the two planets to regularly obscure each other through long eclipses, which have a deep impact on the lives of demons and humans alike.
Not much is to be said regarding the eclipse of Tartaros – the time when the planet is shadowed by Syndesia. The latter possesses no aura, being neither good nor evil as the human race that inhabits it, and casts no influence on Tartaros during an eclipse.
Entirely different is the fate of Syndesia when the planet is obscured by Tartaros. The event, which lasts for several real-time hours, sees the human world plagued by the demonic aura of Tartaros and the desire of Babilis and its progeny to taste human blood. Thanks to the aura, demons don’t suffer the usual penalties when walking the grounds of Syndesia, retaining all the powers they have on Tartaros, and being able to haunt humans until the eclipse is over.
During the unnatural dark times, several Stargates are spawned on the two planets, allowing demons to effortlessly invade Syndesia. Such portals can be closed, but it’s an incredibly strenuous task for even the largest human armies, since the locations are infested not only by demon players, but also by AI-controlled demonic spawns.
More often than not, the only chance of humans during an eclipse is to lock themselves up in their towns and villages and try to hold off the invaders, praying for the Long Night to be over soon.