Murtagh is s Son of Morzan, the first and last of Galbatorix' Forsworn. Murtagh is the Rider of Thorn, the red dragon. He and Thorn used to be slaves of Galbatorix but when he was killed, they went to live up north alone. They occasionally come and help teach. Murtagh is a master of the blade, and his sword is Zar'roc, or "Misery." He is now pretty good friends with Eragon. Murtagh is also the father of a new generation rider, named Morgad. When Morgad's dragon hatched, Murtagh brought him here to learn, thinking the school would be better for teaching than Murtagh himself would.