An observable universe where, although the speed of light could not traverse every point, every point could at least exert a faint influence on any other point at any moment along the timeline.
A causal universe where two points could have no connection whatsoever and could only reach each other through means that violated causality.
All causal universes necessarily fell under a single set of physical laws. Otherwise, there would be no foundation for travel methods that transcended causality to function.
Above that lay the "physical universe."
Different universes belonging to the same collection of theories of everything. Yet crucial parameters such as constants and forms of manifestation differed slightly. Mere causal travel could not traverse an entire physical universe.
Above that was the mathematical universe.
Universes belonging to the same mathematics, the same logic.
Within the same mathematical universe, different theories of everything concerning different "realities" might exist. And if there was a theoretical description of a reality, then those realities could be considered to truly exist.
Yet no matter how differently those theories of everything manifested, they could certainly be written and witnessed in inherently similar mathematical languages.
Every tier of universe was an infinite leap upward from the tier below. And advancement between fragments of mathematical universes could be called a leap, an ascension, into higher-order infinity.
According to Neon's observations, a fragment of a mathematical universe capable of accommodating and witnessing the Celestial Great Saint's dwelling place needed to be embedded with the power of inaccessible cardinals, or even something beyond them.
This meant that fragments of ordinary constructible mathematical universes, even some simple extensions, could not so much as touch the edge of the Celestial Great Saint.
Moreover, Neon had already gained complete control over and judgment of every function within second-order arithmetic, yet she