The Mount Song Sect (嵩山派) is headed by Zuo Lengshan, who leads the alliance. It is based on the same mountain as the Shaolin Sect but is situated on a different peak. The ambitious and ruthless Zuo wishes to consolidate power by intimidating the other four sects to submit to him. He sends his spy Lao Denuo to infiltrate the Mount Hua Sect and steal Yue Buqun's 'Violet Mist Divine Skill' manual and instigates the exiled Sword faction members to challenge Yue. He bribes members of the Mount Tai Sect to turn against their leader Tianmen, who is betrayed and killed by his own men during a special ceremony. Zuo also sends his lackeys to assassinate Dingjing, one of the three leaders of the (North) Mount Heng Sect. In the earlier part of the novel, Zuo confronts Liu Zhengfeng of the (South) Mount Heng Sect during the latter's retirement ceremony to force him to surrender. Zuo is eventually defeated by Yue Buqun and blinded. He is killed by Linghu Chong during the chaotic scene when they are trapped by Yue Buqun in a cave.