The holocron of Sam Sinays was an ancient Sith artifact constructed by the Dark Lord of the Decreton Empire Sam Sinays. Within it were the fine points of Sam Sinays' reign, starting with his self-imposed exile from Darth Malak's Sith Empire, his discovery of the Devastator on Primus Goluud and many more. It also contained the largest library of Sith alchemy ever incorporated into a holocron, a vast record of the galaxies including passing mention to Aarde, a galaxy-wide history up to that point and over 500,000 star charts (many of which were still undiscovered as of the Unity era).