.  I'm opposed to the mirror world idea, because as far as we know, it doesn't function by using TAR to create virtual realities like the Testatron ter'angreal the AS use or appear to tap into mirror worlds in any way during the course of its normal function. I think it's broken because Avi senses nothing from it, and there may be evidence she can read even a ter'angreal which she can't use. And I put those two ideas together to reject the notion that it might have some unused mirror world scanning function lying in wait for Aviendha in a similar way to how Callandor was warded against any except Rand, especially since there is no mention of Aviendha in the Karaethon Cycle (or any prophecy more than a few years old) that I'm aware of.  The Testing Arches and Testing Rings are distinct and are not solely Mirror World tapping. They mix Mirror World tapping, with TAR, dream bubbles, nightmares, etc., whereas I'd say the columns mix Mirror World tapping with Blood-visioning (and possibly other unknowns).  I