Whether "other histories" possessed "reality" was actually a very strange question.
You could not say that something lacked reality simply because it had no effect on you.
As long as something objectively existed there and would not vanish merely because no one perceived it, then it ought to be "real."
Yet the only thing capable of proving that "other histories" existed was the subjective experience of foreknowers.
Or things that possessed other infinite powers.
And for artifacts possessing the power of "infinity," temporarily creating finite entities with reality was not impossible either.
A labyrinth, that sort of time machine, could casually spawn matter.
For that very reason, the Wang Qi Union, which was merely the labyrinth's "idle noise," could also be called Tier 4.5.
Because the Wang Qi Union truly possessed the ability to spawn infinite resources.
So long as the Wang Qi Union had the thought, they could immediately spawn matter several orders of magnitude greater than the mass of the observable universe.
Enough to knead the entire universe into a black hole.
It was said that the Wang Qis had once planned to pile up a black hole weighing a thousand observable universes outside the labyrinth, then use the labyrinth to construct a "black hole computer."
A black hole computer used a black hole's ability to warp spacetime, allowing its operator to directly skip over "infinite" computation time and obtain the actual result. It was also a kind of reverse-temporal computer.
A black hole computer did not require manipulating the singularity itself. It merely used the singularity's peculiarities in spacetime to accomplish its task.
Note that the black hole here had to weigh at least a thousand times more than the observable universe.
Otherwise, the black hole would evaporate—though that evaporation process might exceed the universe's theoretical lifespan,