Those Years as a Demon Slayer

The world is in chaos with demons and monsters, people are dying of hunger everywhere, the sky is full of yellow sand, and the borders are beyond the Great Wall. Xu Qing is a demon slayer, and Xu Qing is also a monster. Transform into a glutton, devour monsters, increase your moral character, and steal the secrets of the monsters' talents. Shielding the breath, mimicking the physical form, having copper teeth and iron teeth, stealing the sky and changing the sun, all kinds of talents and secrets are endless...