This helm was designed specifically for miners and was contracted out to both the Templars of the Arcane and the Dwarves of Dwarf Town. Somewhere along the lines the Dwarves decided to attach massive lights to the helm to make it easier to see in the dark. But the Templars, being of a slightly different mind decided to embue it with magic to make the wearer more capable of dodging rockfalls. When they'd each done their work to the helm they presented it to the miners. The miners could see benefits to both sides but noticed one minor problem, the helms lights were extremely vulnerable to the falling rocks that the Templars had tried to evade and if hit would smash causing a small explosion inside the helm.