MTL - Fox in the Penalty Area - Chapter 218 i will keep an eye on you

She was a medical genius from the Noah Medical Academy as well as a drug producing specialist. After sleeping for three days, she had returned to the ancient era and become the loyal marquis palace’s ignorant and silly young miss.

Chen Shen traveled to a world of immortals and became the corpse collector of the Xianzong, burying the dead disciples every day.

To bury the disciples of the seventh level of Qi training, to obtain their immortal skills and experience, and to obtain part of their spiritual roots.

To bury the disciples of Daofeng’s inner disciples in the array, get the spirit-gathering array, the killing array, and the experience of the array.

Bury alchemy masters, get Peiyuan alchemy recipes, build foundation alchemy recipes, and get alchemy master experience packs.

Bury super geniuses, complete spiritual roots, and achieve heavenly spiritual roots…

Twenty years later, Chen Shen, the body collector who has grown into a Jindan Zhenjun but is still low-key, discovered that the corpses sent this time were unusual, as if they were from the whole sect!

- Description from novelbuddy

This novel is also known as Phoenix Cry Firmament

The previous owner of Mu Ru Yue’s body had been poisoned. Because of this, her meridians were blocked, hindering her cultivation, which eventually led to her being known as trash. After being beaten to death, Mu Ru Yue, who had originally been a successor to a medicinal aristocratic family in Hua Xia, reincarnated into her new body.

They want to seal my path?

I will train to reach the peak of the realms!

They give me a foolish prince as my husband?

I can make do with him.

It would be easier for me to deal with him, rather than with other candidates who would be thrown at me in the future. I shall strive to become powerful enough that nobody will be able to mock or kill me!

- Description from novelupdates

Being able to see into people's past has no real appeal for the teenager this story is about, letting him use it only as amusement and to show off when he was drunk.Never watch into someone's past beyond a superficial level.Never try to find out more than you should.NEVER. EVER. LOOK. INTO. THE. FUTURE.But everything changed the moment he was forced to look into the future, was forced to investigate a murder, and was forced to make the acquaintance of the victim's twin brother('s fists).The more time passed, the more it appeared that the primary reason for this murder wasn't a local problem, but a global one.This single, marred corpse was the beginning of a threat that would shake the world.(MC looses a screw when he enters the prison)BL, first-person view; MC is shuo (perhaps even a reversible couple); love interest falls in love first; both MC and ML are straight, mutual bending, Enemies to Lovers