Star Wars - Edge of the Empire
Seemingly killed during The Clone Wars, Mother Talzin's spirit resides withing the living force on Dathomir.
Mother Talzin was the leader of the Witches of Dathomir, or the Night Sisters before her tribe was wiped out.
Mother Talzin disappeared into the force when Dooku would have struck her down. She exists in the force on Dathomir because of her strong connection to the planet. In a battlewith Count Dooku, Darth Sidious and General Grievious, she sacrificed her physical life and form to save Darth Maul, a lost son of Dathomir after he had escaped the clutches of Darth Sidious on Mandalore.