Global Reincarnation: Only I Know the Plot - Chapter 919:

This story is centered around the man named Yi Ji-Hyuk, who has spent 1000 years in a Medieval Western fantasy-like world before returning back to the modern-day Earth. When he returns, he finds that his home is facing monster threats, and that humans with superpowers have appeared to protect the innocent people of Earth.

He was the continent’s strongest and most revered alchemist, Ye Zifeng. He was under one person and above millions. However, due to an unpredictable event, he had died. After his rebirth, he had become the supertrash of the Ye family and suffered disgrace. To make matters worse, he had an argument with his fiancé that led to the break off of his engagement. In this second life, he will work to change his own destiny. He vows to return to the peak of the world, trample on those who laughed at him and rewrite his legacy!

- Description from Novelupdates

Mystery is the nourishment that keeps me from being ordinary.

It has been 20 years since he came to a world similar to the modern European background. With his early wisdom, Fei Lin learned a skill and finally became a decent person.

Originally thought that he would marry a wife and have children and live this life in a dull way, but found that there is another world under the shadow of the world.

In that world, there are occultists who practice esoteric techniques and master extraordinary powers.

It is weird to spy on humans in the dark and feed on humans.

There are evil god believers who worship the evil god, please the evil god through bloody sacrifices, and exchange power from the evil god.

There is an evil god who wanders outside the world, peeps at the world, and only infiltrates the power of scales and claws, which is enough to cause people to fall.

With the mystery as nourishment, he is no longer ordinary after 20 years of ordinary.

- Description from novelbuddy

In Victorian England, occult practitioners and the Nightmen Police, who hunted occult practitioners, were at odds and engaged in a fight to the death. Legend has it that one of the occult practitioners was a mysterious merchant who ran the world’s largest underground black market in the occult arts, offering a variety of rare treasures. Word says that the Nightmen have a newly appointed young detective whose decisive actions have solved many cases, and occult practitioners are terror-stricken hearing his name.

Duan FeiZhou: Good, both are me.

He transmigrated to this era because he accidentally clicked on an email titled “Congratulations on your million dollar inheritance” and confusingly agreed to join the Nightmen’s side to fight against the occult practitioners.

Who knew that the next day he would inherit a mysterious inheritance from his uncle – the owner of the world’s most prominent black market of secret arts underground trading… This was a bit awkward.

Duan FeiZhou decided to stay away from the strife to avoid falling off the horse and became a salted fish.

On the one hand, crazy black market customers hope that the black market will close down as soon as possible. On the other hand, the Nightmen are negatively idle, hoping that he is quickly fired. However, the more he rushed customers, the more the business of the black market became red hot. The more negativity, the more he was promoted in the Nightmen.

Seeing that the double-sided was becoming a bigger hassle, he was afraid his mask would fall off..

The Scotland Yard’s NIghtmen Leader, code name Z, has white hair, blind eyes, mechanical prosthetics, metal spine, all from war damage; his hobby is hand-rolling cigars, and if he can not save the hostages, he will shoot them together with the criminals. His highest ideal in life is to exterminate all the occult practitioners in the world.

He thought he had a heart of gold with a painful past, but step by step, he was impressed and conquered by the new young Nightman… He also reformed him.

Until one day, he learned that the young man who tugged at his heartstrings was his lifelong enemy – the owner of the world’s largest underground black market for secret arts.

Z: Oh well.

- Description from Novelupdates