The Sith Emperor

Tenebrae — known to the Sith as Vitiate or the Sith Emperor, and to his Eternal Empire as the Immortal Emperor, Valkorion — was an ancient and immensely powerful entity of the dark side who manipulated galactic affairs for over 1,500 years.
Born in 5113 BBY as the illegitimate son of Sith Lord Dramath, Tenebrae became a ruthless conqueror, massacring thousands on Medriaas by the age of ten. When confronted by his father he stripped him of his power and imprisoned his spirit for eternity. Recognizing his incredible power, the Dark Lord Marka Ragnos granted him the title of Lord Vitiate, the new ruler of Medriaas, which he would later rename Nathema. Following the Great Hyperspace War, he tricked the remaining Sith Lords into a ritual that drained their life force, along with that of the entire planet, granting him nigh-immortality and immense power in the Force. Abandoning his old identity, he led the surviving Sith to Dromund Kaas and founded a new Sith Empire, secretly growing it for the next millennium.
During his reign, the Emperor discovered Zakuul and the Eternal Fleet, an advanced armada, and grew disillusioned with Sith ideology. Splitting his consciousness, he became Valkorion, ruler of the Eternal Empire, and sought ultimate immortality. He plotted a war between his Sith Empire and the Galactic Republic, intending to use the destruction to fuel a ritual that would transform him into a god. As part of his plan he orchestrated the Mandalorian Wars, but Jedi Knights Revan and Malak uncovered his schemes. When they sought him out the Emperor took control of their minds; while they eventually broke free, they remained entrenched in the dark side and enacted the Jedi Civil War, which weakened both the Republic and Sith. Revan later opposed the Sith Emperor yet again, delaying his the Great Galactic War for centuries and forcing him into a peace treaty. However, the conflict reignited and the Emperor attempted to use a galaxy-wide ritual, which was thwarted by the Hero of Tython.
Defeated, the Emperor's spirit lingered on and reawakened by consuming the planet Ziost before then resurfacing as Valkorion to rule the Eternal Empire. His twin sons, Arcann and Thexan, conquered the galaxy, capturing a warrior later known as the Outlander. Seeing the Outlander as a worthy vessel, Valkorion embedded his essence in their mind, guiding them to defeat his children and the Eternal Fleet. In a final bid for control, he tried to seize the Outlander's body but was banished with the help of his own family. Simultaneously, Jedi and Sith champions destroyed his original body and severed his power. A final remnant of his essence attempted to take Jedi Grand Master Satele Shan as a new host, but she and her allies managed to eradicate him once and for all.
==Appearances==
===Non-canon appearances===
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Category:Characters
Category:Star Wars Characters
Category:Sith
Category:Eternal Empire
Category:Dark side practitioners
Category:Masterminds
Category:Sith Empire
Category:Antagonists