Inspirations
The Abyss has the general vibe of outer space as pictured by H.P. Lovecraft: utterly alien, unfathomable, the home of impossibly ancient creepy crawlies, the source of madness-inducing weird experiences, attractive to the types who seek forbidden knowledge.
(As an aside, I should refine the cosmology a little bit more later to explain the place of Genos and Nox in it)
There is a place called The Abyss in both the Forgotten Realms (D&D) and the Age of Lost Omens (Pathfinder). While ours shares the basic idea of an infinite chaotic plane, an even closer inspiration is The Far Realm from D&D. Not the mechanics of it necessarily, but the general feeling. Here’s a decent video on the subject:
So What Is It?
The Abyss is not actually outer space as we know it. The Veiled Age doesn’t necessarily have galaxies full of suns and planets, as least as far as anyone knows. This is a universe where the geocentric model is roughly correct. The stars are just the visual appearance of demiplanes scattered around Edil. The Abyss is the blackness beyond the sea of stars. I picture it not as empty space but as a diffuse, ever-churning fluid of some kind, with things living in its currents.
Let’s define some terms.
- A Primordial is a being native to the Abyss. One mayor may not be ridiculously ancient, but as a whole they existed far before the planet Edil did. As a general rule, nobody has actually seen a Primordial since the Golden Veil was created.
- An Aberration is what we call a natural, living creature from Edil that has been corrupted by the Abyss and turned into something more disturbing. The Faceless Stalkers in Secret of Gloam Lake are an example that’s appeared in a story already. As a general rule, Aberrations are evil, or at least have alien intentions at odds with humanoid life.
- Occult is the general adjective describing all of the above and anything Abyss related. Note that people in the Veiled Age wouldn’t consider Modus to be Occult. A deal with the devil is at least something you can get in writing. The Abyss can be touched, but its corrupting influence cannot be reasoned with.
- Undead is the result of the Abyss somehow interacting with a corpse. This is the one and only source of undead in the setting.
The Abyss Is Bad
Transmutation and chaos are the general themes here. Any attempt to interact with or use the Abyss is ill-advised, not to mention illegal. You will be changed, and probably not for the better, at least according to your friends. Physical change is possible. Madness is likely. In the worst case, it ends in death, followed by undeath or some other alien mockery of your former self. Just say no to touching the Abyss.
When you gaze into the Abyss, the Abyss gazes also into you.
Part of the reason Occult magic is illegal is that the Abyssal influence tends to spread. Its formless energies seem to have a life of its own, and one with an infectious quality.
While the Veiled Age overall doesn’t have a bleak, Lovecraftian tone, the Abyss makes it a setting with significant cosmic horror elements, since Edil seems to be just a marble floating in a nightmare realm, protected by a thin Golden Veil.
There is some evidence the Abyss is not purely hostile and evil, however. Nox, many scholars agree, is or was a Primordial. That raises the question though: is Nox unique? Is Nox, a being capable of birthing gods, merely one of a species or class of beings native to The Abyss?