Thirty Thousand Years After My Journey to the West, I Rebuilt the Underworld

Thirty thousand years after the journey to the west, the heaven collapsed, the spiritual mountains disappeared, demons were rampant, and no one knew the name of the underworld. Xu Yi took a scroll of the Shadow God Picture that could be exchanged for rewards and traveled all over the world, accepting tasks entrusted by the remnant soul of the Great Sage, drinking wine with Zhenjun Erlang, watching Chang'e dance in the Moon Palace, and discussing Taoism with the current emperor. One person and one knife can make this world clear!