One Piece: Path to Power - Power Leveling

Leon is an average high school student who likes to watch anime and read novels.
He's about to cross the street, only to be greeted by a truck and died.
But, he got reincarnated as Uchiha yet dead again because Itachi killed him.
Leon got reincarnated again as the grandson of the recovery girl.
He got kidnaped and tortured by All For One.
After his third death, he got reincarnated as a son of Bibi Dong.
In this fourth life, he wants to change his fate to become the strongest.

Note: Please read the tag before reading.
- English is not my first language, so there would be grammatical mistakes in this story.
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The way of a Demon Lord - since the beginning of time, countless demons dreamt of it but few dared to tread on it, and even fewer reached its end. But the rarest of them all were some special demons who were not allowed to step on it, because if they were to become a Demon Lord- even the other lords would have to bow their heads. Abhorred and hunted by all, they could not do anything but hide till their lifespans came to an end. But for the first time ever, one such demon chose to do otherwise.

Follow Adrian Darkheart as he uses his special demonic power, superior intellect and innate brutality to walk the path of chaos and destruction and become the greatest Demon Lord ever.

Warning: The story is exceedingly dark and contains explicit mature and gore scenes.

Do not betray your employer;
Do not betray your companions;
do not lie;
Rather than violate it, I would rather be silent.
These are the four laws that “The Silent One” has abided by for thousands of years.

Day and night we roamed the streets of the Yordian cities,
Dressed in Chinese clothes, wearing a mask, with a long sword on his waist and a dagger in his pocket.
We take lives and receive payment.
We are as humble as ants and as noble as kings.
We hold the power over the life and death of others.
I never cared when I died.

Content tags: Fantasy and Magic Romance of the West Revenge

Search keywords: Protagonist: Giuliano, Enzo ┃ Supporting role: Antoine ┃ Others: fantasy, fictional, assassin

- Description from novelbuddy

Chu Chen brought the temple in his heart to the Dachang Heavenly Dynasty and worshipped the Taoist gate.

Refining alchemy inside, repairing talisman outside;

Reciting sutras and convincing the spirit, fasting ceremony.

Palm thunder method, pinch sword art, step on Yu step, pray for sunshine and rain, call gods to send generals, relieve Erdu people, cut demons and demons…

- Description from novelbuddy