Karros, also known as Karros the Editor and the Lord of Lore, was a Sith Pureblood and a Sith Lord of the Old Sith Empire who was arguably the greatest Sith philosopher of his time. Though he died prior to the year 4500 BBY, he lingered in the land of the living as a Force ghost in the tomb his followers built for him, dwelling ever on the mysteries of the Force.