The simum blew that day as it had never blown before. For generations thereafter, the Arabs recounted the legend of a boy who had turned himself into the wind, almost destroying a military camp, in defiance of the most powerful chief in the desert.

When the simum ceased to blow, everyone looked to the place where the boy had been. But he was no longer there; he was standing next to a sand-covered sentinel, on the far side of the camp.

The men were terrified at his sorcery. But there were two people who were smiling: the alchemist, because he had found his perfect disciple, and the chief, because that disciple had understood the glory of God.