Luffy, has become so dominant that a growing number of manga and anime fans now consider him Shōnen Jump's strongest hero.

Gear 5 is powerful, but Luffy needs to master Supreme King Haki to defeat stronger enemies. Supreme King Haki can't be trained directly; Luffy needs to grow stronger to improve it. Luffy must ...

One Piece just gave one Holy Knight a devil fruit power as broken as the Nika Fruit, setting him up as Luffy's next opponent.