Black Iron Core

A Black Iron Core is a piece of proscribed technology used exclusively amongst the Battle-Titans of the Legio Xestobiax. Developed on the distant and isolationnist Forge World of Zhao-Arkhad, the use and development of the Black Iron Cores directly violates the Crimson Accord of Mars and has been declared heretek by the wider Adeptus Mechanicus. During the Great Scouring, the Metalican Mechanicum Assay teams officially purged both the Forge World and the Legio Xestobiax from this practice. It is unknown if this technology is still used by the Dark Mechanicus or other renegade fractions.