Darth Exius

Darth Exius, The Spectral Lord, was the leader of the Korriban Triumvirate and thus the acting "dark lord". He was impossibly old, to the point that his physical self no longer exists.

Early life
"I no longer "exist" in a sense. I' am so old that time has withered me to nothing, my body is dead but my mind is well alive. I have seen my planet fall and burn. I' am part of the Dark Side in almost entirety."

- Darth Exius

It is unknown whether Exius was born on Korriban or Eshvada. At the time of the Relic Wars he was rumoured to be a thousand years old, which means he was born sometime before the 2nd Mandalorian War.

Appearance on Korriban
Twenty years before the death of Darth Rehmmus, Darth Exius joined the Council and everyone was to fearful to ask questions. He recruited both Darth Threx and Darth Vethra as his pawns in one day claiming the title of Dark Lord of the Korribanite Empire. When Darth Rehmmus was killed on Aseen'Pata, Darth Exius approached the Council with his suggestion that he become the next Dark Lord. The suggestion was taken more as a life or death demand, and the Council agreed that he, Threx and Vethra would rule as a triumvirate, with Exius as the centre of power.

The Hunt for the Relics
The Triumvirate sought ancient holocrons and Sith relics, but none more so than the Mask of Darth Kayon, a treasure almost as old as Exius. The news of this relic was first spoken of by Threx, who suggested that the Empire focus on determining its location and capturing it. The Mask was revealed to be on Evxa Abaddion, an ancient Sith planet named after Exva-Uun. The Jedi learnt of the Triumvirate's intention to claim the Mask as soon as possible, and intervened. As the three Sith lords travelled to Evxa Abaddion they were sidetracked by a Jedi attack force lead by Ralas Kress. Darth Exius, who was restoring his existence with his unique Force drain power, sent Threx and Vethra to dispose of the Jedi. Threx fought the other Jedi while Vethra challenge Kress. She easily defeated him, and the two returned to their master. The Mask of Darth Kayon was reclaimed, and Exius used it as subsitute for his need to restore his existence.