Bone Steel

Bone Steel
Discovered in the late 1800. Magi have been trying to make a Steel/iron version of Celestial Bronze/Imperial Gold but they couldn't use the same step they end up make a new prossice which used human bone which is wear it get it name. Unlike the other magic metal this one rust, and the metal break down in 100 years but is much easy to make than Celestial Bronze/Imperial Gold.