God Tim Currys voice really fits the role of Doviculus.
The giant tank thing is
The ultimate portable stage, when it's time to take the metal to your enemies' front door.
Massive ranged assault and support vehicle. Pyro mortars rain death upon enemies from afar while portable speaker stacks motivate nearby troops, raising their damage output. Oh, and there's also the front-mounted crusher.
Drivable vehicle. Eddie plays the Bladehenge solo, summoning the Blade of the Metal Gods upon his enemies.