Reinventing Magic: An Inventor's Tale - Chapter 89: The Forbidden Expanse

Lin An's life underwent a drastic change.The basketball under his bed had turned into a bleeding head, which would hop next to his pillow and hum softly by his ear at midnight. The subway racing into the station had become a gigantic lizard, opening its gaping maw, waiting for him to line up and feed it.The world was not as simple as he had imagined. Behind the bustle of the city, the Witch Hunter Knights roamed in search of evil wizards to slay.The ordinary worker, Lin An, inadvertently became a member of the Antler Witch-Hunting Knight Order, shouldering the glorious mission to protect humanity.He must be careful, careful, and then even more careful.Careful not to reveal his true identity as a wizard.…“Why Hunt a Cowardly Innocent Wizard?!”

It was started with a harmless request, “Jessica, clear out a room for Zoey, she'll be moving in with us for the time being.”Jessica's marriage soon ended when that 'guest' climbed up the ladder, from a guest room downstairs, to Jessica's bedroom, and then, her husband's bed.After losing in the fight for her husband's attention and love, Jessica realized it was time to wear back her garment of dignity and respect. She signed the divorce papers and left the country.Two years later, she returned as the heiress to a conglomerate, but her husband was at the airport, waiting to welcome her home.“When did I say I didn't love you, Jessica?” he asked.

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

This stands at the forefront of strategy guides to Life (a shitty video game)!