MTL - Ninja World: I’m Not a Human Being! - Chapter 221

Joshua woke up in the middle of a battlefield one day only to discover that he has been transmigrated into a popular MMORPG, Continental War. Discovering that he has not only been displaced in space but also in time, Joshua realizes he has knowledge of the events unfolding around the world as he had played through them as game events. Read on to discover how Joshua forges his path towards becoming a legendary warrior!

Chen Mobai, a third-year student of Xianmen No. 5 High School, is working hard to review and prepare for the entrance to Daoyuan. The direction of his efforts is: to develop a new world

- Description from novelbuddy

Crossing to One Piece world, he became Roger’s younger brother.

A decade ago, the first dungeon gates appeared, but some vanished before they were ever conquered. The MC, a low-rank hunter, awakens the Lost Gate System, granting him access to these forgotten dungeons where legendary monsters and artifacts are trapped. Each completed lost gate grants him absurd power, but also reveals terrifying truths—these dungeons are prisons for ancient beings who want revenge.