I'm Playing in Prehistoric Times

Xu Yun accidentally traveled to the prehistoric world, and the beginning was the story of Li Shimin's soul traveling to the underworld. Just when Xu Yun didn't know what to do, the god-level role-playing system was activated, attacking and defending aliens. When the ghost asked in horror, "Who are you?" Xu Yun shook the Desert Eagle in his hand and said with a smile, "As for who I am, the two guns will give the answer." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.