i'm not making any new claims or anything here, just writing through some thoughts i've had...

Myrdrraal: A throw back to the human side of a trolloc's genetics. Their abilities include being able to travel through shadows, sight without eyes, only partial existence in "this" world (the wind doesn't touch them, only a misty reflection in mirrors) and being able to link with an amount of trollocs. The linking with trollocs is similar to how an AS bond a warder with the warder going mental if his AS as a fist will trollocs do when the commanding myrdrraal die. travelling the shadows is obviously like travelling.

i think that myrddraal are the equivalent to channellers and are "born" with a similar frequency. now i'm not saying that they channel, but that maybe the genetic basis is there that the mutation of having the genetic potential is what makes them closer to human (because animals can't channel). instead though they can "channel" (for a better word) the the taint they were born with, the taint that originally made the trollocs, the TP. i think that aginor intricately used the TP while developing the trolloc.

myrddraal are so infused with the TP (in a similar way to how nym are, without obviously being constructs) that they are slightly "outside of the pattern" as the DO is. i think the reason that when fades are used to turn a channeller, the weaves that are channelled through a fade sort of turns those weaves into the TP or at least carries a resonance of the TP with it. an alternative to the thirteen channellers and thirteen fades might well be thirteen channellers using the TP.

that is why a myrddraal is such an obvious choice for the DO avatar because it is already filled with TP it was just a case of enhancing what was already there.

Three Ring ter'angreal: the two that are known are the rings at rhuidean and the novice to accepted challenge. i was wondering what were the original purpose of these rings? they need to be constantly "plugged into" the OP and appear to be of a similar ilk to the twisted stone ring. ring grants access to t'a'r and the rings obviously do something similar, but what's the point?

i think both the ter'angreal at rhuidean and the WT are like holodecks for recording messages/scenarios/memories. i think the AS who travelled with the aiel set it up to remind them and sort of programmed those scenes into it. the WT one though is weird. what's the point of generating your fears? unless at some point an AS reprogrammed it do that, which would mean early on in the WT's formation an AS knew how to work it.

the rhuidean one seems to have preprogrammed scenes into it, but the WT obviously draws from the user, but also has some "memories" in there. people who go in know things that they should not, perhaps they are echoes of memory from previous users?

nynaeave's testing (fears):

1. failing to defeat the shadow
2. failing her "people"
3. not being able to be with lan

egwene

1. failing rand
2. failing rand
3. failing rand

on egwene's third arch, the strongest thought in her mind are the black ajah and the number thirteen. in her testing both these feature strongly, with the threat of being turned and elaida amongst thirteen black ajah. so it would stand that the ter'angreal is able to pick up on egwene's thoughts or maybe egwene's thoughts shaped what she experienced?

perhaps it is because as they go through the arches that they will face something horrible, their fears that they then produce something awful, their greatest fears. perhaps if they were told that through those arches were the greatest things you had ever seen, that would be what they experienced? that would echo how t'a'r works, using your will to shape and manipulate t'a'r. maybe that's why it's important that they remember "the way comes but once, be steadfast" that remembering that causes the gateway to appear. perhaps if you were told it comes whenever you wish it, it would. after all for practical application, when it was made what's the point in having something like that, that doesn't last more than a few minutes?