Either the entire universe would bear it, or the civilization to which the holder belonged would.
That was the choice Pandora's Magic Box gave its holder.
If no choice was made, then by default, the entire universe would bear it.
Therefore, Pandora's Magic Box had to come into contact with Bacterial Civilization before Bacterial Civilization could possibly bear the cost.
This choice was similar to the cost of Void Server. The cost of that Contained Object in Evil God Game was to distort oneself or distort the universe.
However, Bacterial Civilization had the right to choose for itself, and the individuals of its civilization could also use Pandora's Magic Box.
Blue White Society choosing to have its own civilization bear the burden was Blue White Society's business. It had taken into account that a Cosmic-class disaster was more dangerous.
But that did not guarantee that everyone would think the same way.
After Bacterial Civilization endured various disasters, famines, and even terrifying population decline, it changed its mind.
Why should we bear this cost for the entire universe? Should we be the ones to hold up the sky when it collapses? Once we are destroyed, won't the alien civilizations continue developing just fine?
No! If disaster comes, everyone should suffer together. If destruction comes, everyone should be destroyed together. No one gets to live well—let's see who has the worst luck.
Although this line of thought could not be confirmed, it could be inferred.
"Another possibility is that Bacterial Civilization has already realized that some existence lies beyond the universe. My injections of nanomedical fluid and actions such as surgically repairing my injuries may have alerted Bacterial Civilization to something."
"Especially since I sometimes take out the box to seal away the force acting on me. Of course, I can't leave