You could give him for example a book containing all senku knowledge from dr. stone.

Will Shirou create mystical codes in the future?

No, leave him alone with his fūinjutsu.

in general, I like the MC and the outline of the story, but it seems to me that Shirou is a bit detached from reality, as if he were some young master from those Chinese novels and the only thing that matters is himself, of course the good thing is that he doesn't want to unnecessarily expose himself to death like a certain "hero of justice" but he gives the impression that he is cutting himself off from other people because he seems a bit inhuman and two-dimensional to me, of course, let him look for power, let him become stronger, just let him see that there is something beyond this strength and power, that there is love, other people, that one should live life, let him see that the blade has two faces, one that can cut down enemies and the other can protect what is dear. The blade itself is dangerous, so it always has a sheath to prevent it from being damaged or injuring others

No

Save Hermione!!!

This is epilog of volume next should be volume 3 chapter 1.

What about tsunade experimenting with adding yin and yang to the different natures of the chakra. For example, yin gives more control of precision and shape, and yang increases overall power in return for decreased control. An example with yin-added water and high control could bypass the Kekkei Genkai, causing the water at the molecular level to turn into ice or steam and thus be controlled by the tsunade.

Amazing

maybe magic related to fairies like in mahoutsukai no yome?

Raven

rho aias

Crimson Lions