"My heavens, when did this thing appear?"

Zong Ze looked up at the vibrant wall that seemed to isolate heaven and earth, unable to help but marvel.

"Not long after the Eastern Polar Dragon King died, the senior set up this barrier here. He calls it the Extreme Wood, which greatly enhances a cultivator's defense."

Jian Tu led Zong Ze and Yubai through the city walls, explaining as they walked.