Born on Eriadu, Orrus de Sadd was taken in and trained by a powerful Dark Jedi. When Orrus had finished his training, he thanked his master by stabbing him in the heart with a vibroknife. He went to Roon to find some old Sith secrets he believed could be found there, but soon clashed with the Covenant. After killing three Blackguards and a Sith Apprentice, Darth Obscurus challenged him to a duel - a duel which Orrus quickly lost. Rather than killing him, Obscurus offered him the position as head of the Covenant Academy - a position de Sadd occupied until the formation of the Sith Enclave, after which he was transferred to the Lorn Academy as a trainer.