This bloodline had first appeared within Sayuri Uchiha as Suikinmyaku. And it was stated that she was the sole possessor of the bloodline limit. However, with the development of her last son, whom had been naturally born with the ability to control magnetic fields; later manifested in the metal kekkei genkai, which in turn, established a completely new bloodline. Like other users of metal release variations, the specific user is given the ability to create metals at a whim. The most notable being iron and copper however, the users of this bloodline are able to push their prowess a step further to create steel; a metallic alloy formed by the combination of iron and carbon. An even stronger and harder metal than iron. As such, steel is more than likely capability of penetrating most defenses