The Endless Abyss
An endless realm that starts right outside of the confines of the Domain of Man, with the material world being at the very first "step" of the Abyss in fact. Even though it is described as an "abyss", this is from a higher being's perspective, but to those below these beings, the Abyss is more of an endless ladder spiraling upwards for eternity. Each "step" is described as "one less limitation, and a step higher into the realm of the godhood", with each one being infinitely further away and harder to reach than the previous. Every step higher they ascend, is another limitation that is removed from them from the physical world, as such, one may have to rest after every few steps, as ascending too fast may quickly drain mental capacity by not adapting to the higher worlds and drive them to insanity, if not downright kill them by losing the mental capacity to even think to continue living on. Every step is also described to be mentally agonizing and spiritually taxing to endure, from feeling extreme frostbite all over your body, to feeling as if your body was being ripped apart to shreds with every step taken.
The Underside
Often referred to as the "background" of the physical world, even existing outside of the Endless Abyss. This "background" lies far beyond all the higher planes, permeating and influencing all of the planes of existence in the physical world. This "background" can also be described as the final boundary which separates the physical world from the metaphysical realm beyond all concepts of the physical world. These concepts include all logic and the "meaning" of logic itself, as well as all forms mathematics all every possible extension of it as such things are contained by the Endless Abyss. This would include all geometry and manifolds, as well as all forms of sets that may describe them, which would include all absolute sets and any higher extension of them, regardless of the scale. Regardless of how high a being may ascend, they are unable to escape the Physical World without letting go of their physical form. The Underside is ruled over by Charon, who is the guardian and acts like the gatekeeper between the Physical World and Metaphysical Realms, as well as the guide who guides the conceptual essence that is the soul into Limbo after their death.
Outer Realms
These realms are free of all limitations in a story, these worlds completely encompass everything else in them. Even the smallest of these realms is able to completely encompass the concepts of the physical world and the the only way to be able to access these realms is by letting go of one's physical form and accept themselves as a completely metaphysical and abstract entity. "Death" is one way to access these realms, as it allows the very core of a person's being to escape beyond the confines of the physical world. Since it does not participate in the concepts of time and space, the core of a being is a metaphysical attribute which transcends such concepts altogether as the essence of the being's sense of self.
Limbo
A realm that lies far beyond the physical world, it is a purely abstract and metaphysical world where the souls of the dead are sent before they ascend to the Afterlife. Every verse has its own interpretation of Limbo which connects to the Afterlife of the layer of reality it exists in.
Afterlife
The Afterlife is interconnected to all of the stories within its layer of reality, yet it isn't bound by any of them, thus any character that dies or is discarded from the story is sent here to observe from far above. This realm exists far, far higher than the infinite hierarchy of the Grand Design of that layer of reality. The beings that are capable of manifesting at the absolute bottom of this realm are infinitely above those at the peak of Limbo. The Afterlife does not exactly exist outside the framework of Limbo, as Limbo is a lower aspect of the Afterlife; they not being completely separate realms, as they are still connected in some way, forming one, large composite hierarchy.
Heaven and Purgatory
These two realms exist on opposite sides of the Temple of the Supreme. In Heaven, you have the divine beings, such as angels. In Purgatory, you have the demonic beings, which are not to be confused with devils, whom of which are in a completely different category of beings than demons. Both of these realms exist even higher than the Afterlife by an incalculable degree of transcendence in relation to the Afterlife.
Reality Layer
A composite hierarchy that builds up the very foundation of all narratives and story hierarchies, as well as being the very framework in which all story hierarchies are able to even exist in the first place. A reality layer is often described as a sort of "boundary" which separates each layer of reality, with each layer completely transcending the previous as each reality layer has a reality-fictional difference between each other.
Every reality layer is also infinitely-layered on their own, being comprised up of an infinite number of Grand Designs and utterly transcending them. Making even the lowest of reality layers High Outerverse level, with the next reality layer's scale vastly larger than the previous.
Veil of Thought
The absolute height and limit of all intelligence and truths of the world. The Veil of Thought contains all intelligence, as it is the "truth" of the world itself. Due to this nature, everything that can be said or described is "false", or rather anything said or described is impossible to be true, since the Veil of Thought holds "truth" itself. Since the Veil of Thought is the absolute limit of intelligence, it is "truth" itself, which is an indescribable nature that forgoes all logic and comprehension. If one was to describe the "truth" of the world, whatever can be said would fail to describe the true nature of it, since all things that can be said are falsified and incorrect.
The Antiverse
An empty world of nothingness where all stories and characters go after they meet their end, breaking down their concepts into conceptual information that goes to the Conceptual Void which then can be used for later use.
Conceptual Void
An endless void where all the conceptual information in existence is created, visualized and returned to once concepts are destroyed and broken down. This information can then be pulled from the void, weaved into concepts, and implemented into stories