C579 The Sword Formation Killed the Enemy

At this moment, thirteenth prince's face was filled with a faint smile. He raised his head to look at Sun Bing and said, "This is the supreme treasure that my father has given me. The power that can increase the battle formation is a treasure of the battlefield. I didn't expect you to force me to use such a treasure. Don't worry. As long as I'm the one who comes out