Beautiful Wife from Heaven: Mr. Qi, Let’s Get Married - Chapter 219 - : Worth It

The end of the world is coming, the world has undergone great changes, and everything has changed. Plants, animals, and even insects, as long as there are living things, have mutated.
Become more powerful, and even evolved supernatural abilities, such as chickens and ducks that can fly to the sky, such as cats and dogs that can breathe fire.
But only humans, without any obvious changes, seem to have fallen from the top of the food chain to the bottom of the food chain overnight.
Any creature that can open its mouth to eat can treat humans as food.
But fortunately, this world has not completely killed humans. Gradually, humans discovered that they had the ability to cultivate compatibility with other creatures.
As long as it has a high degree of compatibility with some powerful mutant creatures, it can be used for its own use to achieve the purpose of protecting itself.
Fang He is a person who is very compatible with mutant animals, but it is also because of his ability that he has changed from the strongest to the stupidest.
Fang He, who was reborn, said, “Hmph, this time…”

- Description from novelbuddy

I was reborn into a chaebol family.Into a time with no cryptocurrency, no internet, and nothing else.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

Suddenly becomes a mafia boss in a superpowers world and you are only 3 years old?! Ainsley Sloan, a 20-year-old avid anime lover, suddenly transmigrated into a body of a toddler. The father eloped with a woman, and the mother was just a surrogate mom. The two left behind their 3-years-old baby girl to rule over a mid-sized mafia family!No, this can't be! Ainsley was forced to embrace the abandoned Sloan Family and bring their family to the top of the dangerous mafia world– else she died. But, worry not! With the power of ultimate luck, the help of her loyal subordinates, and the protection of her cats-becoming-human, Ainsley will kick any enemies coming her way! A late encounter with a certain system even paved a flowery path for her. With its help, Ainsley will be the best mafia boss, and an extraordinary one! When other mafia bosses smoke cigarettes, Ain has choco Pocky stuck in her mouth. When other bosses swirl their glass of red wine, Ain blows her cup of hot milk! When other bosses blow their gun after a fight...Ain changes her diaper. Watch the baby take over the mafia world with her unique baby charm! 7 years later. A certain shrewd mini boss: "Ain, how about becoming my fiancee?" The boy five years older than the toddler waved a limited edition BL pillow case as a bribe. A certain system: kiddo, accept his proposal! sucks his money! Wtf you two. Fiancee your a*s!! I'm only 10!