Empire of Man Helblaster Volley Gun & Helstorm Rocket BatteryA pair of powerful artillery pieces for your Empire of Man armies Devastate opposing regiments with hails of shot from Helblaster Volley Guns Rain explosive death down on enemies from afar with Helstorm Rocket Batteries The Helstorm Rocket Battery was inspired by a particularly impressive fireworks display. Early prototypes blew apart some of the Imperial Engineers School, but the engineers persevered and created a deadly, if unpredictable, weapon.