C337 Deep Secret Passage
After going deep into the secret passage, Luo Xuan had been very careful and walked very slowly. The secret passage was very long, going from top to bottom and slowly going deeper.
The air in the secret passage was not very circulating. This was a key point that Luo Xuan discovered. The structure of this secret passage was very particular. The deeper one went, the weaker the air flow would be
