Pirate: Shura Wushuang

At the age of ten, he learned the overlord color and the armed color in one month, and learned the sight color in the second month. His swordsmanship reached the level of a swordsman. It was too fast, and there was no real battle on the edge of life and death. At this speed, he would become a general in underage. It would be boring to upgrade too fast. The book of invincibility too fast would be either very short, or it would be a eunuch.

It's not a big problem that your strength improves too fast. The key is that you don't even know some basic knowledge of pirates, which makes it a bit uncomfortable to watch. I remember that Shanks was already an adult when the Roger Pirates disbanded. The Navy and the World Government didn't know that Roger was from the D clan. Oden didn't have a child so soon. The golden lion's ability can't let him fly by himself, but can only make objects float. These basic things are written in a mess, and the characters of the supporting characters are also a mess. . .

Can the sword held by the protagonist be replaced by the Seven-Star Sword?

This book looks pretty good now, but it's a bit short. Let's read it for a while!