Savage Opress was a Zabrak apprentice of Count Dooku, after Darth Sidious decided that Asajj Ventress was too powerful to be trusted. Created to be a great warrior, Savage was altered by the Nightsisters following a plan by Ventress to exact revenge on Count Dooku. He was a Nightbrother and the brother of Feral and Darth Maul. In the television series, after Asajj Ventress chose him to kill Darth Tyranus (Count Dooku), he was mutated into a ferocious monster. As a test of his reliability, Savage was then ordered to kill Feral, and did so with only a moment's hesitation. Shortly after, he was given an enchanted blade by the Nightsisters to use as a weapon. As part of Ventress' plan, he was sent to Dooku's home planet and was then offered to Tyranus as a new apprentice, under the guise of being a complimentary gift from Mother Talzin, the leader of the Nightsisters. In reality, Opress was implanted as a sleeper agent with the intention of killing Tyranus. Mentally conditioned to obey Ventress, Opress nevertheless became an ally to Tyranus, single-handedly killing two Jedi and a squadron of clone troopers on Devaron. Following several sessions of brutal Sith training, Opress was deployed on a botched mission to abduct King Katuunko of Toydaria, which ended in the King's accidental murder. When the time came for Ventress to carry out her plot to kill Tyranus, Opress' hatred for both of his masters broke his brainwashing and allowed him to act independently. A subsequent battle with Tyranus, Ventress and the Jedi Knights Anakin Skywalker and Obi-Wan Kenobi - the latter being the man who had killed Darth Maul on Naboo - left Opress wounded. Limping back to Dathomir, Opress turned to Mother Talzin for help. She claimed to Opress that his brother, Darth Maul, survived the Battle of Naboo and is in exile in the Outer Rim. Opress embarked on a personal journey to find his brother and to enlist his help in destroying both Dooku and Ventress.