C599 Master's debt

Kunlun replied again, "What are you afraid of? I didn't say that the Immortal Slaying Sword Formation isn't from your Xuanyuan family, but I met a senior from your Xuanyuan Family in a certain place. The Immortal Slaying Sword Formation this senior of yours used is called the Immortal Slaying Sword Formation, and what you used was just that you didn't learn it