"The trouble is big."

At this moment, Jiang Yan's face was extremely grim.

He had thought that the power Su Xin unleashed in the previous duel was already his limit, but he didn't expect that Su Xin had still been holding back.

"He's nearly comprehended the essence of five Concepts, even higher than me. How did a newcomer achieve this?" Jiang Yan was full of confusion.