Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 21Vol 05 : Duel

An accident gave Ye Han a magical ability to see through. Since then, his life has become rich and colorful. He has developed the strongest business empire, dominated the gambling world, and rejuvenated his medical skills. He has become a master of medicine and Taoism. The goddesses rushed towards him one after another. As a man, and a limited edition man, Ye Han was under a lot of pressure and had to go on an exploration with a few tomb robbers. However, a shocking secret from ancient times to the present gradually emerged. in front of him!

- Description from novelbuddy

Other people’s Alliance Heads are unrivaled in the lands, with an incomparable domineering air. With a shake of their arm they could cause a thousand waves to ripple throughout Jianghu.Tang Doudou practically wants to flip the table!Cook, warm the bed, warm the bed, cook… She’s completely been caught up in a goddamned cycle!After she finishes she still has to ask a phrase of husband-sama are you pleased?Uncle could endure but Auntie can’t endure!“Wife has worked hard. A moment in the spring night is worth a thousand pounds of gold, when we get home this husband will give you a massage!” This demonically charming black-bellied man’s phoenix eyes flashed as he smiled with a completely harmless expression.Tang Doudou looked to the sky speechless, …

Ji Huan’s parents both died in a traffic accident.
Unexpectedly, his older sister also meets the same fate.
Yet everything starts when he says “goodbye” for the last time.

Hunting monsters? Genetic comparison?
Ji Huan flees with his older sister’s posthumous child to his hometown, Bade Town.
The three Grandpa, grandson, and nephew all live interdependent days.
However, inside the swaddling clothes is not a human baby,
But a monster…

Black egg body, white ring eyes, red mouth.
A child, ah! Doesn’t he have two eyes and a mouth! Resembling an egg, he is Ji Huan’s cute nephew!

Vermilion tiled wall, white lotus pond, convalescent courtyard.
This entirely neatly handsome and elegant young man: Ah Jin.
However, he told Ji Huan about the secrets of the monsters and discreetly taught him.
Bade Town is also slowly being covered in monsters…

Or, the record of a small countryside monster’s growth.

- Description from Novelupdates

5 years after the world changed, the final boss appeared.