 What was the special power held by Altha?
He found himself shooting downward into a vast void that glowed softly with a mysterious all-pervading radiance. Toward this barrier the spinner bore him, and Rolf was content to let it move in that direction—from the heights of the wall he could scout out the country beyond. So slowly was the spinner dropping that the blackened desolation of the other hemisphere came sliding up beneath his boots. "Down, Altha," a deeper voice rumbled from above, "it's one of the Enemy." This mysterious world that floated above the cavern floor might be their headquarters.
 She could see into other's minds.
 She could see in the dark.  She could see into other's minds.  She feared nothing.  She could see into the future.