C348 Amazing discovery

Nangong Shi jumped down, followed the veins of Bing Jing's heart and only stopped after reaching the bottom.

"Who exactly set this up? With such a large scale, even with my current strength, I'm afraid that it would be difficult for me to lay down such a fine formation. Also, what is the purpose of this person setting up this formation? " Nangong Shi muttered to himself