Chapter 172: Dragon Scale Runes

Yi Yun and company's training lasted all the way till sunset.

Including Yi Yun, all of them were exhausted. They felt like a layer of skin had been peeled off.

But, all the way until the end, there were only ten people who could lift the Primal Arrow. Among those ten, besides Zhou Kui and Yi Yun, the rest were Black Turtle Army members who had rested for a long time. They could just about manage to lift the Primal Arrow in a better condition.

But no one left a mark deeper than one foot in the purple tungsten wall using the Primal Arrow.