Darth Plagueis

Darth Plagueis was a Dark Lord of the Sith and the master of the powerful Sith Darth Sidious.

When speaking with Anakin Skywalker regarding the supposed similarity of the Jedi and the Sith, Sidious, in his role as Supreme Chancellor Palpatine, stated that their discussion put him in mind of a Sith legend called The Tragedy of Darth Plagueis the Wise. He told Anakin that according to the legend, Plagueis was a Dark Lord of the Sith who was so powerful that could use the Force to influence midi-chlorians to create life; that his knowledge of the dark side was such that he could even keep those he cared about from dying.

Plagueis, however, became so powerful that the only thing he feared was losing his power, which he eventually did, teaching his apprentice everything he knew, only for the apprentice to then kill him in his sleep.

Later, upon revealing himself to Anakin as a Sith Lord, he told him that only his master had attained the power to cheat death, but he was sure they could discover it if they worked together.

Appearances

 * Star Wars Episode III: Revenge of the Sith