Brotherhood of Iron Warcaster

This was for a steampunk fantasy I was working around with until I got serious with my sci-fi universe. I may play around with the concept once my Sci-fi is something more than a collection of sketches and notes. Also, I might try to color this one eventually, we'll see how that turns out...

Explanation time! The Brotherhood of Iron is a militant cult that uses a substance (forgot the name) that produces a smoke that, when used in conjunction with some spells, greatly enhances its effects (example: turns a simple fireball into an orb of blackish plasma. Blackish cause of the smoke). The side effect is a loss of oxygen from the blood stream (I imagine that breaking the laws of physics is hard enough, takes a lot out of a caster) so theirs a breather thingy to make sure the caster gets enough air in his system.
The Armor is to look damn cool wile protecting the caster from his own overpowered spells, as well as enemy attacks.