Semirhage did. She massacred the entire Imperial Family and left a sudden void in leadership that led to a nationwide war of succession.



Indeed it would be, except there are too many problems. Firstly, getting to the mainland with any reasonable army will be very difficult from Seanchan - it is thousands of miles away. Demandred cannot Travel there with them, because unless the entire army are darkfriends, they'd destroy him on the spot. Secondly, they'd obey Fortuona without question when they encountered her, making his whole army useless.

There is something very unusual about Demandred because we've accounted for most of the armies on the mainland, and even if he's hiding in some small borderland country, his army would never be very big. Graendal has personally been to Shara and it's unlikely she would have missed his influence there. One possibility is that he has control of the Aiel who did not follow Rand and who remained in the Waste - which is a huge force.

My original idea was always that he was going to lead the Blight, but it seems that Moridin is doing that. Moridin's also in charge of the Black Tower it seems.