MTL - Positive Energy System - Chapter 5 Lost memory

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

She breaks all the rules.When master thief Xavier Valentine died, he caught the attention of Calypso, the Goddess of Reincarnation who turned death into her personal gameshow. But rather than simply send him to a new life, she made an unprecedented choice:She followed him in.Now trapped in a world of magic until seven Primordial Gates are cleared, Calypso and Xavier form an unlikely alliance. He needs to level up to survive. She needs entertainment to stay sane. The prestigious Catalyst Academy needs them to stop causing chaos for five minutes.They're probably going to disappoint everyone.In a world where dungeons hold divine secrets and ancient gates lead to untold power, one thing is certain:This goddess isn't letting her favorite soul leave her alone.