MTL - One Piece: Wudang Baiye, Deputy Captain of the Straw Hats - Chapter 384

Born naturally defective but possessed by the spirit of a divine dragon. Inheriting the divine dragon’s will and power, growing scales and magical claws, imperial waters containing the breath of the dragon, travelling through clouds and summoning rain, an invincible physical body. In this world and era, countless men dream of slaying dragons. Li Mu Yang has always lived a hard life.

- Description from Novelupdates

In a distant future, the empires of mankind span the galaxy, and glorious Earth has devolved into a peripheral backwater.

In Shanjing city in the Asian region, Wang Zheng’s dreams of becoming a mech pilot are crushed when his college entrance exam genetic score turns out a pathetic twenty eight, barely above an animal.

To make things worse, people get the impression he attempted suicide after being rejected by the campus beauty.

Then the closest thing to a family he has, the old man in the book store across the road, goes missing, leaving him only a mysterious birthday present.

In the previous life, he was in the shopping mall, and he was unwilling to die from a terminal illness, but was taken to the King Kong Temple in the prosperous world of martial arts by a Buddha statue of the medicine master, and was reborn as a medicine monk.

In this life, he only wants to live forever, to practice Buddhism and not to seek liberation

However, he unexpectedly discovered that with the blessing of Medicine Buddha, the mantra can turn legends into reality, and their power will be greatly increased.

The great light mantra, transcends the soul and goes straight to the bliss of the Western Heaven,

The mantra of clearing the heart, clearing the mind and calming the spirit, the mind is like still water,

Rejuvenation mantra, heals injuries like a god

……

He was even judged to be a waste of martial arts, but with the help of Medicine Buddha, he was able to practice Buddhist martial arts to the legendary realm.

Originally, I wanted to cultivate various medicinal materials, practice martial arts, practice Buddhism, and live in peace in this top sect Daxueshan King Kong Temple.

But I don’t want to, at this time, the Dagan Dynasty has experienced prosperity for thousands of years, and it has come to the moment from prosperity to decline.

- Description from novelbuddy

Roy died during a war against the Evil God Cult, but somehow, he returned back in time to 30 years in the past where he was just a boy who awaken his summoning magic.