C859 A Mysterious and Strange Instrument

After exiting the tunnel, the two of them entered a stone hall. In the middle of the hall, there were three long black stones. The shape of these stones was almost exactly the same as the one outside.

Zhuge Yao was about to walk forward and carefully examine the situation of these black stones. However, as soon as he took a step forward, the three stones emitted a dazzling red light. Moreover