The machine and its crew disappear in a green fireball. Remove them.

Place the large template over the warpstone chunk inside the cannon. All the models under the template, including the cannon, suffer a hit at D6 Strength.

The gun overloads with energy and starts spinning wildly under the effect of mysterious forces. It finally stops, firing an unbelievably powerful burst. Pivot the gun on the spot so that it faces in the direction indicated by a Scatter dice and resolve a shot at maximum range and maximum Strength (48" and Strength 10!), firing flat.