XoXaan, a Sith Lord, was the creator of the holocron that bears her name, XoXaan. Following their loss in the Hundred-Year Darkness, XoXaan was among the Dark Jedi exiled from the Galactic Republic. The Tombs of Korriban became the final resting place of her holocron.
Many years following her demise, A'Sharad Hett, a former Jedi Master, stumbled upon the Holocron. By feigning the identity of a Sith Acolyte, he gained knowledge of the dark side of the Force from the Holocron's gatekeeper. Ultimately, he embraced her teachings as a genuine student, thus establishing the unconventional One Sith.