Brandon hinted at some severe limitations on Shaidar Haran to affect the physical world. He says that a lot of actions that people assume to be those of Shaidar Haran in the book in one particular scene were physically carried out by Elza. He further indicated that Shadar Haran would have been incapable of physically placing the collar himself.
The comments refer in part to how the Domination Band that Semirhage used to collar Rand in The Gathering Storm 17 was obtained from Cadsuaneās box.
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