The new shonen action manga from the creator of Magi is here! Musashi is a teenager living under demon rule. As children, he and his best friend made a promise: to become the greatest warriors in the world and overthrow the demons. But life intervenes, and five years later, he finds himself about to become a miner. Yet can Musashi truly be satisfied with a normal life? THE DEMON METAL BLADE The only weapon that can vanquish a demon, and only those who overcome its "blade test" can become samurai and face off against the demon gods. However, something strange happens to Musashi when he takes the blade test. A mysterious shadow dwelling within him transforms his soul into black crystals, dredges up his past, and forces him to confront the childhood memories that he had buried deep within his heart...