Star Wars: The Clone Wars – Season 3, Episode 17 //
Ghosts of Mortis
The Son was an embodiment of the dark side of the Force who dwelled on Mortis during the Clone Wars with his sister, the light-sider known as Daughter, and the powerful Force user known as Father, who tried to keep them in balance. Son sought to escape Mortis and wreak havoc in the galaxy, trying repeatedly to lure Anakin Skywalker to the dark side by changing form, possessing Ahsoka Tano and finally by showing Anakin a vision of the terrible acts he would commit. His efforts ultimately failed, culminating in his death along with those of Daughter and Father.
In the mysterious realm of Mortis there exists a trio of beings able to wield the Force in ways no known mortals of the galaxy can. The Father maintained balance between his Daughter and his Son, who expressed affinity to the light and dark side of the Force, respectively. The Father knew his days were numbered -- facing his impending demise, he needed to find another to keep the balance. His goal was the same described in an ancient Jedi prophecy -- the rise of a Chosen One who will bring balance to the Force.
In an uncharted region of space, Mortis is an ethereal place that defies conventional description. During the Clone Wars, an immense monolith appeared in the Chrelythiumn system, broadcasting an ancient Jedi distress code. Anakin Skywalker, Obi-Wan Kenobi and Ahsoka Tano investigated the kilometers-wide artifact, and were drawn into a paradise realm inhabited by unspeakably powerful Force-wielders. These god-like beings were locked in an eternal struggle for dominance, which made Mortis the fulcrum of the entire galaxy and the Force.
Ahsoka Tano, a Togruta female, was the Padawan learner to Anakin Skywalker and a hero of the Clone Wars. Alongside Anakin, she grew from headstrong student into a mature leader. But her destiny laid along a different path than the Jedi.
Discovered as a slave on Tatooine by Qui-Gon Jinn and Obi-Wan Kenobi, Anakin Skywalker had the potential to become one of the most powerful Jedi ever, and was believed by some to be the prophesied Chosen One who would bring balance to the Force. A hero of the Clone Wars, Anakin was caring and compassionate, but also had a fear of loss that would prove to be his downfall.
A legendary Jedi Master, Obi-Wan Kenobi was a noble man and gifted in the ways of the Force. He trained Anakin Skywalker, served as a general in the Republic Army during the Clone Wars, and guided Luke Skywalker as a mentor.
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Before the Jedi can leave Mortis, the Son takes Ahsoka captive in an attempt to entice Anakin into joining him to use their combined strength to overpower his Father and Sister. To this end, the Son casts Ahsoka under the spell of the dark side. Meanwhile, the Father attempts to stave off a disastrous showdown between his children and maintain the Force's increasingly precarious balance on the planet. Fearing that the Son may be unstoppable, the Daughter does the forbidden by taking Obi-Wan Kenobi to the Altar of Mortis, wherein is kept the Dagger of Mortis, a weapon capable of killing a Force-wielder. The Son steals the weapon, and attempts to use it against his Father to steal his power and end his rule, but the Daughter sacrifices herself, placing herself in front of the blade.
With help from R2-D2 and a squad of captured battle droids, an elite team of Jedi and clone troopers led by Obi-Wan and Anakin attempt to free a captive Jedi general, Even Piell, from an impenetrable prison. Despite orders to the contrary, Ahsoka Tano tags along, though she proves indispensable when the infiltration mission begins to evolve. Piell and his fleet officer, Captain Tarkin, are liberated from their cells, but now the fugitives must escape the Citadel itself.