Cleon
Legend
I agree Reflection shouldn't be easily entered, but it'd be strange if only Kamerel could get in. Let's drop the word "unique" and talk about how difficult it is to get there in an underbar on the plane.
Well it needs to be at least very obscure or difficult to enter to explain why no-one's followed them or even knows where they went to.
If you do want non-kamerel to be able to enter or scry the Plane of Reflection, I suppose we could say it requires an epic-level DC skill check using, say, Knowledge (the planes) or Spellcraft (maybe with the latter requiring the spellcaster to have seen Reflection or a kamerel entering/leaving it?
I suppose you're right about the library. The problem with this adventure, like many other old ones, is that it's hard to tell the intent of the author, but I agree that there should be some distinction.
Yes, although in the case of Reflection I don't think the plane was supposed to feature in the adventure, its description seems more like background flavour to the Kamerel.