Eighteen Years of the Sky

Traditional Fantasy, the Protagonist Comes from a Wilderness

Traditional Fantasy, Sword Master, Not Invincible, Not Useless

I want to read a book similar to "Sword Comes". It doesn't matter whether there is a genius stream without a system, whether there is a heroine or a harem, what is important is the kind of genius who grows up and ends up everywhere (swordsmanship) and needs brains (otherwise he will be too invincible), it is best to have some faith and be good at swordsmanship.