Star Wars: The Old Republic - Sacrafice

Years before the Galactic War, Emperor Valkorion of the Eternal Empire looks without any visible emotion as his twin sons grow into men - and projectors of the Force. With the army of the Eternal Empire ready to commence attacks on both the Galactic Republic and the Sith Empire years later, Arcann and Thexan, now skilled lightsaber combatants, lead an assault on the Sith holy world of Korriban, where the Twi'lek female Sith Darth Atroxa coordinates the defending forces. Arcann suffers grievous injuries in the fight, including the loss of his left arm, and when the twin princes arrive at Valkorion's throne room, presenting lightsabers of the defeated Republic and Sith forces as trophies to the Emperor, he once again shows no emotion and indifferently turns away from the brothers. This enrages Arcann to the point of wanting to murder his own father.