C663 Deep within the ruins

"Hmm?"

At this time, Cheng Fei looked at the air in front of him and frowned.

"The air has changed!"

Cheng Fei came to a conclusion.

"Right, there must be some substance inside that can make people bloodthirsty and excited!"

The Hui Tian Tower also noticed the change in the air and quickly told Cheng Fei its conclusion