One Piece: Grinding Experience as a Pirate Slave

Li En transmigrates into the world of pirates.

From the start, he’s captured and taken aboard a pirate ship, reduced to a slave stripped of all rights.

Small and unimpressive, with only average talent, how can he survive among a gang of vicious pirates?

The answer is to grind.

With a personal proficiency panel, Li En can gain experience through grinding and improve his skill proficiency, making himself stronger and stronger.

Later, Li En grinds the Six Powers over and over, pushing them to their limits.

He grinds Observation Haki again and again until it evolves into Future Sight.

He grinds Armament Haki until he becomes a monster with overwhelming offense and defense.

He grinds Conqueror's Haki until he ultimately rules the seas.

He grinds his Devil Fruit proficiency again and again, becoming unmatched in its mastery.

This is the story of a pirate slave who grinds his way to become lord of the seas.