MTL - There is Room For a Beautiful Daughter-in-law In the Rebirth Era - Chapter 299 announced

[You have awakened with the Lifespan Extraction System!][Extract Lifespan, advance your Cultivation and Cultivation Talent, amass an unstoppable Army of Shadow Beasts, and ascend to the Pinnacle of the World of Immortal Cultivation!]In the Super-Continent of Legaria, a Godlike youngling was born… and abandoned.Scorned and hated by all for merely existing, Zar struggled day in and day out, just trying to survive to see the next dawn. In a world of Intelligent Beasts, he, a Half-Beast, Half-Human—a species alien to the inhabitants of Legaria—had no one to rely on.By some miracle, he managed to make it in one piece to his 15th birthday. A day… which changed everything for him.*Ding!*[Are you ready to become the Ultimate Immortal Beast Tamer?]Fate shall be rewritten!Zar—a lone Godling—shall rise up and make even the most arrogant of God Beasts and Immortal Cultivators relinquish their strength to him!

Su Yun was a prodigy, blessed by the gods. However, life is never so easy. Soon after reaching 6th stage in spirit novice realm cultivation, his progress stagnated due to incurring a rare medical condition.

A few years go by, and Su Yun has spent all his time gambling or drinking, wasting his youth away, but one day everything changes. Qing Er, the only one who stood by him was forced by his clan to be a sacrificial bride to someone she didn’t love, only to be executed by the groom on the wedding night for fleeing. Burning for revenge, he scoured the world for a cure for his rare medical condition from both righteous and villainous side.

Countless years go by, and finally Su Yun not only found a way to cure his rare condition but also gain immense knowledge on a myriad of martial techniques.

But before he could fully cure himself, he received news that the groom suffered an assault that damaged his internal organs. Rather than wait for decades to become fully cured, Su Yun decided to hatch a plan for the assassinate of the groom. Unfortunately, he underestimated the strength of the groom’s family and was killed instead.

Then he regains consciousness. He comes to a realization that he went 15 years in the past. This time, he vowed to protect Qing Er, but first he must cure his rare medical condition. Will he learn from the mistakes of his previous life or is everything still set in stone?

- Description from Novelupdates

He was just an ordinary orphan.At least he thought he was,That was until some group claiming to be the Hero Faction tried to recruit him for being the inheritor of a lost bloodline.

The world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeating her.

As the current decade’s Hexennacht approaches, a mysterious girl named Kagami Kagami arrives and meets Horinouchi Mitsuru, the daughter of the previous Hexennacht representative.

It takes place between Kyoukai Senjou no Horizon and the City Series, two other series by the author.