Stephen/Diana
See, this is why you're good at this job. You think ahead.
I'm on my way, but I had a question, something I was a little unclear about. The rings: They're more than just a key to the lock, or both... But are they also a one-to-one magical anchoring point when you're in the Mirror Dimension? You said if you lost it, you'd be stuck there. So is that because you can't get out, or because you'll lose your way without a pathfinder.