Possibly. The light-shield in Rand's mind is unique to him (Naeff did not have one but we know he is not a darkfriend), but it could be that Callandor can do something to it. And given how much of the taint there appears to be in Rand's head, any disruption of the light-shield would likely be a very bad thing.



Yes. Another possibility that just occurred to me is that Rand may end up having problems at Shayol Ghul. How will his light-shield maintain full power, when in the presence of the very source of darkness that is the DO.



This I do not entirely agree with. Naeff has not been channeling the TP, and yet Nynaeve saw the same kind of darkness with the same kind of thorns in his mind. That makes it clear that this is indeed caused by the taint. The darkness in Rand's mind was like that, with the same kinds of thorns, only MUCH bigger and vaster.

Now, it is certainly possible and even likely, that using the TP may have given the darkness in Rand's head an extra boost of power, allowing it to spread. Or perhaps using TP caused the light-shield (if it was already there) to grow dimmer, allowing more of the pre-existing taint to reach Rand. But TP is not the origin of the darkness in Rand, the taint is.

I do agree otherwise however that using TP, especially in the vast amounts that Moridin is using is probably giving the DO significant power over him. The analogy about Ishamaels firey eyes being a reflection of the pit of doom is, I think, an accurate one. I wonder if maybe in the final book, the Saa in Moridin's eyes will reach a point where his eyes will burst to fire. I think that would be cool/fitting.



Maybe. The link with Moridin may also have something to do with it. I mean if TP is the pure essence of the Dark One, and Moridin is essentially absorbing the DO into himself and becoming some kind of human/DO-hybrid, then soon we may have a situation where rather than being just linked to only Moridin, Rand will end up directly connected to the Dark One aswell.

That cannot be good.