C521 Encounter

In the sixth level of the Starry Sky Prison, Zhang Chao and the others waited for around the time it took to burn an incense stick to burn before the Ghost Emperor returned with his entire body covered in green ghost aura.

"Senior Ghost Emperor, how is it? Any gains? " Zhang Chao hurriedly stepped forward and asked.

"Hmm, I've obtained a clue!" The Ghost Emperor nodded his head, "A while ago