[Source] The Holocron of Naga Sadow was a Sith holocron created by Naga Sadow, sometime before the Great Hyperspace War. The Holocron primarily focused on Sith alchemy, of which Sadow was a master. The Holocron was later discovered by Darth Sidious, who incorporated its knowledge into his own seminal work, The Creation of Monsters, and was also referenced by Palpatine in the Telos Holocron.