Star Wars: The Clone Wars

S03E16 Altar of Mortis

As the Jedi prepare to depart Mortis, the Son captures Ahsoka, hoping to lure Anakin into an alliance that could help them overpower the Father and Daughter. To achieve this, he ensnares Ahsoka with the dark side. Meanwhile, the Father strives to prevent a catastrophic conflict between his children and keep the delicate balance of the Force intact on the planet. Concerned about the Son's growing power, the Daughter breaches protocol by bringing Obi-Wan Kenobi to the Altar of Mortis, where the Dagger of Mortis, a weapon lethal to Force users, is hidden. The Son seizes the dagger and turns it against his Father, but the Daughter selflessly intervenes, sacrificing herself to save him.