Rur

Rur was the High Shaman of the Terrible Glare during the time of the Order of the Terrible Glare's war with the Jedi Order thousands of years before the Galactic Civil War. Although Rur physically died with the rest of his order when the Jedi ruined their homeworld of Garn, a semblance of his mind survived, downloaded into a computer in his citadel. Over thousands of years a vengeful Rur lured many Jedi to their deaths with fake distress calls, until aspiring Jedi Luke Skywalker arrived on the planet and informed Rur that the Jedi had been destroyed in the Great Jedi Purge—unable to comprehend that his eternal vengeance was out of reach, Rur's computer exploded.

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