That said, there's resurrection magic, so has it actually happened or is it just what the author has claimed but it has never been verified?
I find that explanation to be really poor as it rewrites the meaning of fixed but, hey, those magical lore don't have to make sense.
Well in the next chapter we see him doing ridiculous things with magic. Apparently he just constructs his magic 10 mana at a time. If he can do that he can probably just make a magical barrier to protect himself and be invulnerable anyways.