That did not work.

Along with their seeming lack of fear of death, humans are also insanely determined. With surprisingly little reason, and no chance of success, humans will repeatedly attempt something an insane number of times.

Mana.

If given immortality, many fear humanity might find a way to break the laws of the universe itself. They’ve already managed to bend them beyond reason.

The tale has been stolen; if detected on Amazon, report the violation.

What should I try next?

The alarming part is, none of this determination stems from intelligence. None of it comes from reason. Knowing, beyond a shadow of a doubt, that they cannot possibly succeed, will only drive a human to try harder.

. . .

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Everything had to be banned. All of it. Governments put a flat ban on mirror splitting humans.

This made some people happy, but more people were annoyed. Some doctors, for instance, had been promoting mirror splitting before a dangerous operation in case something went wrong. And high-risk jobs, such as mining, were being done by one well-trained person who had split. There were uses to training one person then splitting them to do that job multiple times, or in multiple places.

But then there were the underground death fights and splitting bordellos. The benefits of mirror splitting did not outweigh the moral ambiguity of what humans were doing with themselves. Most religions supported the governments in the ban, meaning humans had to choose between God and Country or Fun and Capitalism.

Another war broke out.