It was still somewhat different from a "black hole."
In the worldviews of many low-level civilizations, a white hole was a "hypothetical celestial body." In other words, it theoretically existed, but whether it actually existed was unclear—and whether it could be created was something they couldn't accomplish.
If there happened to be a black hole in the galaxy you occupied, it would be easy to observe.
Wow, so big, so black, and so hairy (gravitational hair).
Of course, it might also be hairless (the no-hair theorem).
That depended on how far you had advanced along the technology tree.
But "white holes" were far rarer than black holes.
In fact, even a level-three civilization might not necessarily be able to detect white-hole phenomena in the universe.
Because they were mobile, and they often involved "cosmic creation."
They were one of the few kinds of "cosmic-grade material sources."
In other words, they were one of the few "creation methods" left behind after the Big Bang.
For example, if an advanced civilization, such as the "Ancient Machinery Civilization," wanted to create a colossal structure spanning multiple galaxies,
the first thing it had to do was create a "white hole." With the help of a "white hole," it could spew out enormous quantities of high-density matter, evolve nebulae, condense stars, and organize galaxies.
Once several artificial galaxies had been created, it could use them as a foundation to build a galactic colossal structure.
Commonly known as laying the foundation.
Rather than treating it as a weapon, advanced civilizations preferred to regard it as a "tool of creation."
It was quite popular among advanced civilizations.
But as the old saying went, once you had built enough things with bricks, they also became very handy for hitting people.
As an ancient civilization proficient in developing "black-hole