Sith'ari

Sith'ari was an ancient title that, in Sith, meant "the Lord" or "Overlord." It was first claimed by the King of Korriban Adas who unified the Sith species twelve millennia before the formation of the Sith Empire.

After Adas's death, the term became the subject of a legend prophesying the coming of a being that would lead and destroy the Sith, but in doing so would make the Sith more powerful than ever before. In this context, the term came to mean "perfect being" or "god." The prophecy, which was in many ways similar to the Jedi prophecy of the Chosen One, retained its importance for the Sith up until the time of the Order of the Sith.

Text and facts from the “Sith'ari/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.