The House With One Thousand Rooms follows an essential cosmological understanding of heaven, while at the same time being cast in the grip of utter terror & nothingness. The horror of No Place is that of creeping understanding; a state foreign to any framework. Rumors that the Oubliette surrounds a center, that there is a true heaven at the center of the Labyrinth, should be taken with a grain of salt. Salt, proof in most folktales against vampires, faeries, & Old Nick.
The Solar Typhon holds all the worlds in its grip, holding them in torrents of roaring, radiant light. It is only the Firmament of the Spheres (those that have them, such as Urth's Ys) that keep the generative energy of the Sun from becoming the mutagenic doom of Red. Worlds such as Urth & Green flourish, while Etegrim & Suik flounder. Alas for Marth, long broken!