[@6slyboy6] I just seems easily countered. I can't imagine it has the greatest mobility, limited further by it's range of movement being confined to a rail system. And while the front is armored against fire it wouldn't be hard for light cave to get around it and throw torches or something with fire, But I guess that is where the rest of us come in. putting some of whats-his-name's royal knights by it as guards could ward off something like that.

of course none of this accounts for whatever magic capabilities the empire has...