Kill Me More Times, I'll Become Invincible - Chapter 20:

Kai of the Sorcerer’s Tower is one of the last mages left, barely surviving in a world ruled by creatures of the dark — where the era of mages ended, and most of the lands got contaminated with dead mana. To save his world and fulfil his master’s last wish, he put himself through a forbidden ritual, risking his soul being ripped into pieces to make his way into the past. In an era with abundant mana — an era yet to enter the Golden Era of Magic. Things go wrong, of course, as they always do, and he finds himself thousands of years before the world fell to mana contamination — in the body of a young lord, Arzan. All is not well, though, as the young lord was murdered by someone right at the cusp of a beast wave threatening the territory, while larger threats loom on the horizon. There was a lot to do for Kai to regain his former strength in this time of primitive technology, but then again, he might just be able to change that.

He is Xi Liang’s legendary emperor: a decisive and ruthless king; a man of supreme wisdom; a cunning strategist.

According to legend, he once conferred the love meant for the three thousand concubines in his harem onto one woman, while the world watched in envy.

According to legend, he once executed a hundred people for her, turning the palace into a purgatory overnight.

According to legend, he ultimately sentenced that same woman to death by execution…

A conspiracy that swept through the country resulted in her tragic end. This lifetime seems to be a repeat of her past life. Can she escape the clutches of fate to attain true love in this life? In both lives, she was the Emperor’s wife, but is that ruthless man really her true love mandated by Heaven?

Did she really die, just like that?

In the end, beyond the veil of lies and mysteries, who exactly was she? Was she a woman that he truly loved, or was she merely a chess piece to be used in his political machinations?

The stories passed onto later generations remain fraught with conflicting opinions.

- Description from Novelupdates

Jung Hyeonwoo who had no talent, no money and no luck. “Why do I see the information inside the game?” He started to see the things that are not supposed to show up since he got electrocuted by lightning.

As the grandmaster who founded demonic cultivation, Wei WuXian roamed the world in his wanton ways, hated by millions for the chaos he created. In the end, he was backstabbed by his dearest shidi and killed by powerful clans that combined to overpower him.

He incarnates into the body of a lunatic who was abandoned by his clan and is later, unwillingly, taken away by a famous cultivator among the sects—Lan WangJi, his archenemy.

This marks the start of a thrilling yet hilarious journey of attacking monsters, solving mysteries, and raising children. From the mutual flirtation along the way, Wei WuXian slowly realizes that Lan WangJi, a seemingly haughty and indifferent poker-face, holds more feelings for Wei WuXian than he is letting on…