MTL - The Manga of Ten Thousand Realms - Chapter 387

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

Kael Veyne was betrayed, hunted, and left for dead in the depths of the Abyssal Dungeon.As an infamous assassin, he was the empire’s deadliest shadow—until the day his guild turned on him.Ambushed in the Abyssal Dungeon, his body was torn apart, and his soul was consumed by the abyss. But death was not the end.He reincarnates 25,000 years later with the Devouring Bloodline System. Kael awakens in the body of a noble scion sharing a similar name to him, and his very essence fused with eldritch power.With every kill, he absorbs primal energy, evolving into something far beyond human. Monsters, mages, mancers, knights, assassins—nothing is beyond his reach.

Nine years ago, humankind almost perished the day monsters came out of the Cracks– aka dungeons– that appeared all over the world.When all hope seemed to be lost, a select few awakened as Hunters equipped with a System.Thanks to them, the civilization recovered faster than one would expect after the apocalypse.However, another conflict presented itself later: the more the Hunters used their powers, the quicker they lost their sanity.Fortunately, among the Awakened People, there is a group classified by the System as Guides– and only these Guides have the power to soothe the Hunters and bring them back to their senses.Sounds great, right?But what happens when a Civilian is in a relationship with a Hunter who has a high matching rate with their Guide?“Let’s break up, Wonhee.”Yep, this is what happens when your Hunter boyfriend has a 76% matching rate with his Guide.Wonhee was dumped by her long-time boyfriend because she’s just a Civilian…… or so she thought.