One Piece: New Order - Chapter 20: Pirate Massacre

The youthful Qin Ye was born almost a century ago, but thanks to immortality granted to him by the ‘fungus of aeons’ he can pass for a high schooler.

Tian Han was a young boy who admired immortals. His dream had always been to become like them—flying on swords, using spells. But he was just an ordinary village boy, and he didn't have much of a chance for that. So, he always read books about immortals, and his admiration for them grew more and more every day. One day, he heard that he had a chance to become an immortal.“You can become immortal.”This was the sentence where his adventure began. Yes, he could become an immortal. And so, his journey started, and he found himself in the ruthless world of immortals.

Chen Sha came to a world of immortal martial arts and was ordered to take charge of the world’s first sect.

Before his death, the previous chief told him:

“If you don’t become the best in the world for one day, you are not allowed to go down the mountain for one day.”

So he closed himself in painstakingly, crossed the heaven gate in his body, and faced off against the ancient and modern powerhouses…

…

Many years later, Chen Sha recalled the day he went down the mountain,

From the moment he descended the mountain, he was number one in the world.

In the next ten epochs, any gods and demons have returned, immortals and Buddhas have lived in the world, ancient powers and ancient gods have appeared one after another.

No matter how the times change, he has always been No. 1 in the world and has never changed.

- Description from novelbuddy

A mission for justice that spans across two lifetimes, a fresh beginning that presents a new opportunity to succeed where he once failed. In a time of grave peril for a world on the brink of anarchy, a hero rises like a phoenix from its own ashes to offer a faint glimmer of hope.Armed with his wealth of knowledge and experience from his past life, as well as an almighty cultivation art obtained under mysterious circumstances, Fang Che sets out to exact vengeance on the Church of the Self-Righteous, a blight on the entire continent and the ones that had put an end to his past life.Original blurb:The long night shrouds the world, and the dawn is delayed.Evil descends upon the earth, and living beings suffer.He wanders in the long night, strolling upon the edge of a blade, swaying between the clouds and hell.Igniting the fire of the star soul.Since the long night stretches on, I shall be the ruler of the night.