I Have a City in Ancient Times

Su Bai traveled to the prehistoric world and found that the demon clan was killing humans to refine the witch-slaying sword. Su Bai awakened the invincible city system. He was invincible only in the important city, so he built the city on top of the heaven and destroyed the heaven. "Kill the Quasi-Saint Emperor Jun and reward a drop of Pangu's essence and blood or increase the scope of the Invincible City..." "Increase the scope of Invincible City!" "Kill the Saint and reward Hongmeng Purple Qi or increase the scope of the Invincible City..." "It is impossible to practice to increase the scope of the Invincible City. One day, I will make my Invincible City cover the entire prehistoric universe!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.