I think I'll be able to join, but about the rules...
...Rare weapons and shields are obvious enough, but what are you defining "Offensive" spells as? I assume if you meant damaging you would have said that, but I don't know. I'd like to know, as the deck that I have in mind contains nightmare. Nightmare could be "offensive", but I don't know how you're defining it.
So yeah, a list of spells or a clearer definition of "offensive" could be nice.