Star Wars: The Clone Wars (2008)

S3E14 Witches of the Mist

Anakin and Obi-Wan are dispatched to investigate the enigmatic figure responsible for the recent killings of Jedi. Their search leads them to Savage Opress, a fearsome apprentice molded by Ventress and trained in the dark arts by Dooku. After failing a mission, Opress returns to Count Dooku, only for Ventress to launch an ambush with Opress at her side. However, Opress's allegiance proves unstable as both Dooku and Ventress realize he possesses his own desires. Later, Savage reunites with Mother Talzin, who assigns him a new mission: to scour the Outer Rim in search of his long-lost brother.