A holocron, crafted by the Sith Lord known as Tulak Hord, was interred within the Tomb of Marka Ragnos. This tomb was located on the planet of Korriban, specifically in the Valley of the Dark Lords. Although many tried to recover the holocron from the [pyramid] in which it was secured, it remained undiscovered for more than a thousand years after its initial placement. Ultimately, a former slave belonging to the reconstituted Sith Empire succeeded in acquiring the artifact.