The Black Iron Order of the Guardian Clan

A hundred years ago, the Black Iron Order reappeared in the world. It was rumored that those who obtained this order could command the world's martial arts. However, the family of guardians who guarded the Black Iron Order had long since disappeared. Now, there is a girl named Song Yao who accidentally discovered a half-broken fragment of the Black Iron Order from her father's belongings after a massacre. She has been hunted by all forces since then.