After entering the territory of the Mysterious Moon Palace, the Blood Eagle Hall had been very cautious. After all, the Mysterious Moon Palace possessed an immortal technique capable of restraining evil aura.
However, they had already reached Bihai Immortal City. Once they broke through the few Immortal Cities of the Mysterious Moon Palace, they could attack the Mysterious Moon Palace directly. Yet, no one from the Mysterious Moon Palace had used that immortal technique until now.
There were two possibilities: one was that only a few knew the technique, and the other was a strategic lure. The Mysterious Moon Palace intentionally gave way and kept retreating, aiming to draw them in.
At this moment, the Ghostly Evil Immortal King said, "I believe that only a few may know that immortal technique; perhaps they haven't realized it can restrain evil aura."
