I am rereading the series, and I am at book 5. And Suan and Leane has been stilled, and they enter the rebel camp in Salidar. And Suan starts to sweat a lot in front of the Aes Sedais there, and she wishes she was still able to block out the heat. But when I read New Spring it clearly stated that it was just a trick of the mind. Surely they has not forgotten to do that even if they are stilled? Or do I remember wrong about that ability? Do you need the One Power to do it?