Dark Lord of the Sith (ASWS)

A Dark Lord of the Sith was an individual who served as the leader of the Order of the Sith Lords created by Darth Bane. The Dark Lords followed the Rule of Two, which stated that there could only exist one Dark Lord and one apprentice at a time. Darth Plagueis was considered one of the most powerful Dark Lords in history, although he was killed by his apprentice who in turn became the Dark Lord.

Appearances

 * Star Wars: Episode I - The Chosen One