Undetected By Anyone

After a series of inquiries, only then did Tang Xiu find out the reason. It turned out that these four Ghost Generals obtained an ancient secret art manual in the Underworld, from which they learned how to create a channel between their world and the mortal world. The end of the tunnel coincidentally ended up in the Lian Family's place.

"So, that Underworld Great Array outside and the Netherworld one inside were laid out by the four of you, and you also imparted the Underworld cultivation art to the Lians?" asked Tang Xiu with a heavy voice

"Yes, and please spare our lives, Venerable Immortal."

The two Ghost Generals were full of trepidation and were scared stiff as they replied.

Tang Xiu shook his head. He no longer cared about it after clearly figuring out the root of the matter. He turned to look at Gu Yan'er and faintly said, "Finish everything here!"

"Alright!"