Chapter 421 : Discovery of Spirit Stone Mine

• This abandoned underground mine was a maze, with occasional collapses blocking the passages with rubble.
• Most of the time, only small animals could squeeze through these blockages. Ordinary people would be helpless without mechanical equipment to assist them. However, Qin Sheng and his companions effortlessly cleared a passage that could accommodate a person.
• As they went deeper, the number of collapsed and blocked passages increased.