MTL - Reincarnation Of The Strongest Sword God - v2 Chapter 4 Black flame?

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

I was born into a prestigious martial family, yet I was nothing but a useless person with no talent whatsoever.At least, that was the case until I was trapped in a dream.[You cannot die here.][You can not lose your mind here.][Time does not move in this place.][You cannot leave until you reach the extreme.]Geniuses and fools—people say these are two unchangeable truths of the world.They claimed that I could never enter certain realms because I was a complete fool.But when a human body and soul are thrown into the extremes of time, they adapt.[Congratulations. You have reached the extreme.]Now, it is time to leave.

The person with the best martial art skill in the world, whose prestige is unparalleled. The head disciple of TianQing sect, the leading sect of all Six Great sects, and Jianghu’s number one, Ming ChangYan shaoxia.

During a decisive battle, he slipped and fell.

His ten years of cultivation was completely annihilated and reduced to a normal human.

Fortunately, he was lucky enough to have fate decide that his life shouldn’t end there, and he survived.

The doctor told him, “To gain back your cultivation, enter the palace as a concubine!”

In order to get the medical herb that was given to the emperor by the XiYu Region, the immortal’s grass, Ming shaoxia could only wear a skirt, apply makeup, endure the humiliation, suffer patiently, and join the palace drama.

Ming ChangYan: This shaoxia is shameless.

Unfortunately, just as he dressed up in drag and entered the palace, he meets the man he once picked up from under a mountain.

…..

Ming ChangYan: I was joking just now…..this is too shameless!

If I were to be found out by him, my (old) number one reputation would go down the drain!

- Description from Novelupdates