MTL - One Piece: The Soul Purchasing Pirate - Chapter 830 I believe it.

Humanity has been gradually transported to the Abyss by a bored god to compete against other races and monsters.The problem is… humanity failed. In a last desperate push the strongest survivors chose a comrade to travel as far as possible back in time.

The Imperial Court of Tang Empire became dim and corrupt. The Emperor believed eunuchs. The officials vied with each other for authority. The Tang Empire was about to collapse. The flouring Confucianism, Buddhism and Taoism eyed it covetously. The three sects wanted to contend for the domination of the whole world. Which one would win in the end? Or would they coexist peacefully at last? Armies of different nations invaded the frontier on all sides. People and the whole world were in extreme misery. Who could save them?

A young man of the Imperial Clan was reborn in Chang’an. In the Last Life, he was framed and was driven out of his place. He was the king of the subjugated country. When he wandered on the streets, he wanted to be an ordinary people and live an ordinary life in Chang’an but failed.

In this life, he determined to fight against the heaven and change his own fate. He would not give those people an opportunity who framed him in his Last Life. He would hold his title and his place. In order to maintain order and peace of the world, he was going to wipe out all villains of the whole world with the Imperial Sword, adhere to the emperor’s principle, and enact the new national law. He would rule over the empire to prove himself.

- Description from Novelupdates

Su Jin, an ordinary poor young man from the countryside working overtime every day to make ends meet in the city to support his family, finds himself in the possession of a book only known as Hell’s Handbook.

The Handbook universe initially seems like a video game as it proceeds to throw him into a different world every month, each world filled with supernatural beings, mythical creatures and deities, and even includes a complete point system along with weapons and special skills.

Surviving these challenges is not easy, but it comes with great rewards.

But he soon realizes that all of this is real. The monetary rewards and magical items he receives from Hell’s Handbook can be used in the real world, but in the same way, every person who dies during a challenge dies in the real world too.

As Su Jin desperately tries to survive each challenge he is thrown into, he slowly starts to uncover the truth behind Hell’s Handbook.

Who is behind Hell’s Handbook and its horror filled challenges? Each challenge reveals a new truth about the world Su Jin lives in, bringing new people into his life even as the world around him becomes harder and harder to trust, and perhaps, even a greater mission in life…

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Standing before you are:

Guardian and patron of darkness,

Disruptors and Reshapers of Order,

creator and persecutor of licking dogs,

The tea master, the goddess of the dark night, the nightmares and gravediggers of the gods,

The true ancestor of blood – Charlotte de Castel.

With madness, with blood, with curse, with destruction.

This is a legend belonging to the blood family…

- Description from novelbuddy