Saa are small black dots which move across the eyes of those who use the True Power extensively. (ACoS,Ch25)

References (Possible Spoilers)#

  1. In A Crown of Swords
    1. ACoS,Ch20 - The Watcher has saa when he uses the True Power.
    2. ACoS,Ch25 - Moghedien observes that Moridin has saa.