The title of Sith Lord is bestowed upon individuals who have demonstrated mastery in both the ways of the Sith, as well as knowledge in the darkside. It is solely granted by the Dark Lord of the Sith however many have claimed to be "Sith Lords" while not being proclaimed by a Dark Lord. These lords typically take on the title "Lord" in recognition of this achievement, and participate in battles or war to increase their prestige so that they might showcase their power and become a member of the Council, or wait to claim a vacant seat when one becomes available. They are among the highest members of the Sith hierarchy. It is common practice for a Sith if they achieve the rank of Sith Lord to take on a "Darth" title.