Dethal was a Fremennik, who lived during the Fifth Age, travelling all around from a place to another. He decided to abandon his Fremennik lifestyle after a sea voyage that went wrong, and became an explorer. In his final battle he confronted the leader of the corrupt White Knights, Sir Lethipus. After severely wounding Dethal, Sir Lethipus realized that his opponent was just a mortal man. The two of them fought fiercely, but it was Dethal who stood victorius in the end.