Helstorm Rocket Battery
From Age of Sigmar - Lexicanum
Helstorm Rocket Battery are war machines created and used by Ironweld Arsenal armies. They fire relentless, earth-shaking volleys of shrieking explosive rockets that detonate into a series of blossoming fireballs that blow entire regiments into shreds. Despite how terrifying these weapons are they are very imprecise.[1][2]
Crew
They are crewed by three Gunnery Crew that can defend themselves with their Tools.[1][2]
Ironweld engineers can vastly improve the accuracy of these war machines by applying their excellent judgement of wind speed, orientation and other factors.[2]
Sources