C797 You Are the One the Wang Family Is Chasing after

Xuan Tian was startled for a second, then his voice became colder and colder. The Black Tortoise Art was a technique passed down from generation to generation in the Xuan family. It was one of the most powerful techniques in the Devil City, but there was a secret that no one except the patriarch knew about.

That was, there was a flaw in the technique