Amikiry

Keep going, this is even more interesting than your book. Although that sets the bar pretty low to be honest For others: Read "Broken Peridot", the story of SI who was reborn as a peridot in Steven Universe and cracked trying to reach the Earth. Currently rebuilding and reprogramming her stone to function more like a human. Highly recommended

I won't give you a single stone until you publish 10 more chapters.

Seems a bit forced, there are more subtle ways to achieve the same result. Ruins the immersion.

As far as I remember he was a student and performed a good luck ritual before an exam, then went to bed and woke up as Klein. He didn't work in IT

It's not about strength as such, but about mental strength. Because of the shortcomings of his technique, Orochimaru is very vulnerable to such things. As for the tailed beasts, they seem to be very vulnerable to illusions too, considering that Obito couldn't be stronger than Kurama when he controlled him. And it was a regular illusion.

This is stupid. He needs to use Kotoamatsukami in every simulation, considering how much benefit he can get from it. Go get the tailed beast, or just find a strong enough person who will help him train and protect him. You can at least brainwash Orochimaru to teleport him to the snake cave and try to learn sage mode.

If what you said about mitosis were true, then bodybuilders who constantly damage and repair their muscles and gain a lot of mass would age much faster than the average person.

I'll stop reading if you start rewriting. If you can't handle one character, what are you going to do with the whole story?

So far so good, but just as a reminder to the author: Rudeus was already pretty strong most of the time. If you make him even stronger, it'll just turn into another power fantasy. Personally, I'd make him stay at about Eris' level in terms of sword. Especially considering he can use healing magic without a spell and metaknowledge, he already seems too strong.

There is a big difference. The author's opinion, the character's opinion, and the character's opinion at the moment are very different things. Let's see what comes out of it.