Prince

The young son of the Sultan was somehow manipulated by the Caliph into slaying him. He awoke with his hands bloodied along his father just in time to be discovered by the Grey Woman, who was rumored to be the Sultan's lover. She cast a curse on him: "A thousand curses upon you and all in this house! Forevermore! Forevermore, your children will pay for your crime, and none shall survive the wretched fate you have assured them. All the sons, and all the fathers, until there are no more... And you will live to see it done, until there are no more to kill. You will be the last to die."

The Prince fled the scene and, with time, he became the Old Man in the Mountain, the centuries old leader of the Assassins.