...but a few.
The winner of the Silver Stone Challenge get's one wish and the ability to dream for one night.
But Eilenar... has been dreaming since he was born. Not only good dreams, also undreams, as he calls nightmares. These are visions of the future, present, but also past. Some never happened at all and never will.
In book two another will dream too at her will. She has stolen this from Eilenar... to do good or evil you'll have to read to find out.