Alchemical Era: Dusk Blade

Humanity's most powerful empire was destroyed by its own alchemical creations thousands of years ago. The surviving humans struggled on the earth and finally re-established civilization a thousand years later. Fang Zheng, a time traveler, was almost beheaded after crossing over. Fortunately, at the last moment, he awakened the Commander's Ring, the ultimate insurance left over from the previous civilization. Fang Zheng traveled across the world, played tricks, and with the ultimate insurance of civilization, defeated the gods created by the previous civilization, making humans the true masters of the world.