The Dread Masters are six powerful Sith Masters with the unique power to strike fear into armies and cripple them. They were imprisoned in The Tomb on Belsavis until Imperial characters freed them. After the defeat of the Emperor, they went rogue and caused much mayhem across the galaxy, so both the Empire and the Republic joined forces to take them down. They are responsible for the events of the earliest operations, from Eternity Vault to Dread Palace.