MTL - Longevity - Chapter 1392 Xuanji

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

Entering the world of cultivation, Brandon Jiang thought he was stepping onto the path of immortality, but little did he know, he was actually walking a path of death!An immortal once said, “If you are not at the dining table, then you are inevitably on the dining table.”Humans are the spirits of all living things, endowed with natural dao embryos and the great medicine of heaven and earth.In this world of cultivation, only by absorbing others' abilities and fortunes can one cultivate!Therefore, mortals are raised as Sacrificial Furnaces.If you don't absorb others, others will absorb you.Brandon Jiang is unwilling to become a Sacrificial Furnace, nor does he want to commit heinous acts.Until the fairy who loved him died in his arms, Brandon Jiang was driven completely mad.Many years later, when Brandon Jiang looked back, he realized that he had become the most ruthless demon in the world.

Zhang Xuan traverses into a foreign world and becomes an honorable teacher. A mysterious library appears in his mind. As long as it is something he has seen, regardless of whether it is a human or an object, a book on its weakness would be automatically compiled. Thus, he became formidable.

“Emperor Haotian, why don’t you like to wear underwear? To think that you’re still an emperor, can you pay more attention to your image?”

“Fairy Linglong, if you continue to suffer from insomnia, you can always look for me. I have a way with lullabies!”

“You as well, Qiankun Demon Lord, can you cut down on the garlic? Do you want to stink me to death?”

…

This is an incredible story about the heritage between teacher and students, cultivating and guiding the world’s strongest experts.

Hypnosis, Time Stop, Eyes of Lust...Just why do I have these skills?!After almost dying, he was reborn as the demon king of lust.Since the world is against him, there was no reason for him to be a good person. Especially since the entire world was hunting him down in the first place.So he decided that he would destroy the world in his own way as the demon king.