This was submitted for the Goblin Artisans design challenge for the Britannian Faction. This is Tommy Occhipinti's Superiority. I renamed it Purity to make the flavour (which I think deliberately has racist overtones) a little clearer.

It also raises the issue of whether I want any gold cards in the set. I hadn't really thought about it until now; I'd been assuming not. But Theros block has heralded in a new pattern where each colour-pair gets a uncommon gold card to encourage drafters in certain directions. I could certainly have and gold, and probably pair any of the colours with blue. Pairing with would be a bit stranger, but this is Code Geass; people's loyalties are not set in stone!

Almost all creature cards in this set are going to be Humans. That's unfortunate but inescapable.

If this mechanic were going to be a big mechanic in the set, then I'd probably want to focus on some major tribes, especially in Britannian colours; which will have to be class types since the creatures will all be Human. Soldiers are one natural example, but if every white or black creature is a Soldier, there's no drawback. (Well, at least not in a dedicated Britannian deck.) It'd also be natural for Britannia to include some nobles, with creature type Advisor, Noble, Aristocrat or whatever. Blue will have Artificers and Advisors, as well as a few Ninjas and similar. Red may well have a lot of Rebels, and also the general Black Knights military who could be either type Soldier or Warrior - if this mechanic were to go ahead, I might want to make sure a lot of them aren't Soldiers.

Britannia is racist, institutionally, and many individual Britannian soldiers are racist personally as well. But I'm not 100% sure that a mechanic quite so focused on racism is what I'd want to use to represent Britannia.