The Abyss is the metaphysical underworld of Tel, though thinking of it as being located beneath anything is misleading. Rather, the way the space of Tel folds topologically, there are regions exposed to the sky (which is the window through which divinity observes the world) and regions that are hidden from it. The Abyss is this space, at least at any given moment. The surface of Tel processes and subducts over long periods of time, with some of the surface eventually flowing down into the spacial crevasses that form naturally, beyond the sky. These subducted zones are dark, with no sun, or even the stars at night to illuminate the surface. Space seems to twist in the dark, making it frighteningly dangerous to navigate. The Abyss is a primordial realm, and is haunted by demons, creatures formed out of pure rapacious chaos.
There are certain regions of Tel that may only be accessed by carefully traversing a region of Abyss- specifically of note is the Lost City of Yôdh.
