Seeking a novel title

Supernatural Rebirth novels
The male lead seems to be of the dark side.
There's a white fox with the Space Element
I remember that the male protagonist was reborn in the beginning. In the previous life, the male protagonist was tested to have dark power. Because the mayor's son did not have any special abilities, he found an organization to dig out the male protagonist's power and press it on his son. The male protagonist was thrown into the sewer, where he met a dying creature and obtained power to survive.
In this life, he didn't expose his power during the inspection. He found the creature in the sewers, but unfortunately, it was too heavily injured and died. However, he obtained her child. It seemed to be a space-type white fox that could transform into a human. Then, he destroyed the branch organization that had stolen his power back then.
It was related to the mayor. Oh, there was also a hint of the apocalypse inside. There were a lot of mutated beasts. At the beginning of the test, it seemed that the ghost baby had invaded.
That's all I remember

Answer 1

This novel was called Battle Through the Heavens.