Zeroth: I'm on mobile so here I go skipping all the quoting and fancy notations.
First: it's been a good long while since I've been titillated by a LotR wording discussion.
Second: I don't know where I picked up the notion that Orthanc came with more than one key, but I happen to have a copy of Two Towers with me and - yup! - it's
the Key of Orthanc. But yeah, I also don't have a problem leaving AB's card as non-unique, for the same reasons you brought up. (Tidbit of my near-future intentions: I
do hope to have a "post-contest" round where we can tinker with the final cardlist, so if we wanna nudge cards slightly, we'll have a thread for it.)
Third: I have no idea how to (easily) apply blur effects in PS. It just hasn't ever come up for me in the past, but I'll look into it once I'm back in the same county as my desktop.