[Source] The obelisk was an ancient Sith artifact, dating back to c. 14,000 BBY. One obelisk was housed on the planet of Krayiss Two, and was used as the gateway for accessing a—likewise age-old—Sith library-temple. It was encountered by the Jedi Knight Vara Nreem when she arrived on Krayiss Two in an attempt to communicate with the Sith.