MTL - One Piece: The Soul Purchasing Pirate - Chapter 38 respectively

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Unrivaled Spear Knight.

The stereotype that knights must use swords is broken by the brightest star of a duke’s family. The hero that brought an end to the empire’s civil war. The name of that person is Joshua Sanders.

Despite his reputation of being called the empire’s unrivaled spear, he was bleeding dark red blood. Not just anyone but by the hand of his own emperor, Kaiser… “Kaiser! Don’t think it will end like this!!” Moments before death, incurred by magic circle, the spear that spent its years together with him, ‘Lugia’, started to emit an enormous amount of energy…

This familiar place, it can’t be… the stable that I used to live in when I was young?

My body became young?! Lugia, what the hell are you?

Joshua returned to his younger self. His ultimate revenge starts here!

A maid who is beaten on behalf of a noble boy.

Some memories of her childhood were cruel, but Yuriel held no resentment towards the boy. Rather, she liked it–The hand that carefully applied medicine to her wounds was always warm.

“M-Master, stop, Raph, sa, save…ah, mm…!”
“That’s why.. I told you.. to wait.. till I returned.”

But the Raphlet that appeared in her dreams showed nothing but passion and lust.

Prophetic dreams.
The ability that was like a stigma drove Yuriel towards an unknown future.

All I want is to be next to you.

The eternal struggle between good and evil, Qin Shuang steps onto the path of cultivating, meeting various heroic individuals on her way to immortality, experiencing various events on her journey.

- Description from Novelupdates