Sith Master

Sith Master was the title of a Sith individual who instructed at least one apprentice in the ways of the dark side of the Force. Traditionally, the apprentice was required to kill his or her mentor before they could train their own apprentice and advance to the rank of Master.

Throughout Sith history, the Master held the titles Sith Lord and Dark Lord of the Sith. In Darth Revan's Sith Empire, Sith Masters held the rank of Sith Lord, but only the strongest Master ruled as Dark Lord of the Sith. Under Darth Bane's Rule of Two, the guiding principle of the Order of the Sith Lords, the Master and his or her apprentice held both titles together.

The Sith Master's role stood in contrast to the rank of Jedi Master, a title given to members of the Jedi Order—adherents to the light side of the Force. Like the Sith Rule of Two, the Jedi Code expressly forbade any master from training two or more apprentices simultaneously.

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