Master Ters Sendon was a Zabrak Jedi Master and one of the founders of the Jedi Order. Sendon believed the role of the Jedi should include safeguarding knowledge, and keeping records of past events in order to share them with future generations. Though Master Ters is long dead a hologram containing his wisdom and teachings has been discovered in the Gnarls, a valley used for training by the Jedi Order on the planet Tython.
As the homeworld of the Jedi Order, Tython holds many secrets. A number of holograms have recently been discovered in the Gnarls, each containing the recorded wisdom of one of the Order's ancient founders. An attack by Flesh Raiders, however, has put these holograms and the knowledge they contain in danger.