Based upon the technology of the Coronus Grav-carrier, the smaller Caladius grav-tank is designed to utilise the firepower afforded by the heaviest elements of the Legio Custodes’ arsenal on a highly mobile, protected platform. Given the fusion of advanced systems and weapons, the Caladius is perhaps the most powerful battleline armoured unit of its size in the Imperium’s forces, utilising technologies and materials derived not only from the Dark Age of Technology, but from developments made as a result of the Great Crusade’s two centuries of warfare.