C475 Risk of mountain collapse

"How could this be? In just a short moment, the entrance was completely filled with these stone balls?" Xuan Qing felt incredulous at the scene in front of him.

"Did you see a big white bat on the way here? is it the size of a human? " Situ Xuan asked seriously.

"There are only groups of small bats. How can there be such big bats? If there really are human-sized bats