Where do I put a non-world flag card?

Hey, random question from random idiot. As you can see above this, I need to know where I would put a special flag card. I have an idea for one, but I don't want to create it until I know the pages that I'd have to update with it. Also, it should be noted that with this flag would come a new attribute, unless someone else has already taken it, and I most likely won't be updating regularly due to different reasons. The main reasons being lack of ideas for cards at the moment, needing to update my Vanguard fanon clan, and whatever stops me IRL. If you do let me know though, it would be greatly appreciated. Bye, and have a nice day. :)