Well then, to begin, please look at the language used to describe OC:
"The Original Creator is at the third level, representing the ultimate, representing chaos, beginning and end, representing the unknowable and undiscussable. No existence can surpass this level, and this level can only have one being, and it's very unstable because both aggregation and division are His instincts.
It is a mass repetition of “represent”, because as is with all beings, even OC embodies some particular notion.
That “particular notion”, then, being this:
“When I was irrational, driven purely by divine instinct, that instinct allowed me to glimpse certain truths—or perhaps root causes.
“Everything in this world originates from the Original Creator. All living beings, all Beyonder characteristics, the way events unfold, and the miraculous turns of fate—all of it.
“What does this mean? It means separation leads to convergence. Something good will inevitably carry bad aspects, and vice versa.
“This is the essence of the world, the fundamental symbol that governs all things. Even existences as powerful as the Great Mother can’t completely avoid it. They can only mitigate its influence.”
The quote-on-quote “essence of the world, the fundamental symbol that governs all things.”
OC is the world, it is all things. It also divides and unifies; it is prone to everything which is conditioned by the Symbol. And because it is so, it embodies it maximally.
Meanwhile, Anthony noticed a strange change in the surrounding scenery: one side reflected the real world—sunlight, stars, green trees, the sea, humans—chaotically jumbled together. The other side resembled a frozen, lifeless universe. Above, brilliant explosions of light continued to erupt, casting out vast amounts of matter, while below, deep, dark abysses consumed everything, compressing it toward a final singular point…
These were still illusions, mere reflections of the mirror world.
Yet even a demigod like Anthony felt an indescribable fear rooted deep in his soul and flesh.
Despite Jenna still being at Sequence 3, without higher-level Beyonder characteristics, her presence was nearly as terrifying as the terror emanating from the depths of the special mirror world.
Because she embodied a most unique and fearsome symbol.
A symbol of the creation and destruction of everything!
^^^ After all, it is not merely OC that is allowed to embody this Symbol, but rather everything. It governs the division and unity of things, creation and destruction, genesis and termination.
For after all, OC is erased into chaos, so if the Symbol did not still exist, how would anything emerge into the next Universe?
OC’s embodiment of this Symbol is meant to be understood the same way as to how Great Old Ones represent their Symbols:
After a pause, Klein continued, "Although the Universe is vast and without an end, the Outer Deities are clearly more familiar with it than we are. They're also stronger, directly representing a certain aspect of the universe. It's very difficult to avoid 'Their' pursuit. Besides, even if we succeed, peace will only last for some time. The recreated civilization will be destroyed in less than a thousand years. When that happens, we won't even have the chance to become Great Old Ones, never capable of any form of self-redemption."
They are explicitly different from the Truths they embody fundamentally, yet, even with that, they can still be called things like “Calamity itself”:
As the planet was torn into fragments in an instant, the three-headed, three-bodied, six-armed Lumian remained completely unaffected.
How could calamity itself ever be harmed by Disaster?
Because in embodying some notion, they become a Symbol, a representative of that notion, and in turn, almost become indistinguishable from it.
This is why OC is also Chaos. Because in maximally embodying it, they become nearly indistinguishable from it—from what Chaos represents.
After all, OC really is just the unity of all Outer Deities, of all representatives. Which is why the “Embodiment of the Universe” can emerge through unity:
"That Lord of the Mysteries and God Almighty of ancient times were unable to restrain themselves from converging together, becoming the embodiment of the entire Universe, which is also the innate instinct of the original Creator."
Godhood is the indestructible spirit of the Creator within all things.
It is also why, you know, OC has an instinct. Because the spirits of the Deities, in coming from a particular concept, embody that concept in the very way they act.
But OC embodies all things. It embodies Chaos—the ground of unity and separation. But in doing so, his instinct literally
becomes unity and separation. That is the instinct of Godhood (OCs Spirit), and so it becomes the instinct of the Universe itself.
Truth: "They" are the Truth and everything within the Gray areas shall be defined by "Them"; Light is too extreme, Darkness is too Corrupt. Order is too rigid, and Shadows are too Distorted—Grayness is the only ultimate Truth of the universe.
So as pure Truth, Chaos remains non-dual and unchanged. But as the embodiment, the exemplification of that Truth into multiplicity, OC divides itself. After all, if all distinction is erased, then there would not be any meaningful difference between the essence of Chaos and OC itself. As such, they are both the same “Primordial Chaos” before creation. But in dividing itself, OC differentiates itself from such Chaos and exemplifies the “everything-ness” of Chaos into intelligible dualities.