Masterblades were Sith Bladeborn who were weapon masters that won ten or more duels against lightsaber-wielding opponents. The title was one of great pride for it signified the user's skill in defeating the weapon of the Jedi, or other Sith. As a sign of their rank, these masterblades were given a Sith Tremor Sword which they used lethally against their enemies.
- Star Wars: Knights of the Old Republic (First mentioned)
- Knights of the Old Republic II: The Sith Lords: Prima Official Game Guide
- The Complete Star Wars Encyclopedia