Chthonos is a world encased entirely in a shell of solid aethersteel, criscrossed with leylines. It was created as a last-resort sanctuary against the legions of Locust by a group of Lemurian sorcerors; however, something went wrong during it's creation, resulting in the destruction of Lemuria. The many intersections of leylines allowed for many forms of life to cross over and inhabit the realm. Despite the large variety of life, no sapient beings settled Chthonos until the aetherkin.