|“||This datacron holds unheard of power and knowledge collected by an ancient race. You access its power and discover writings which are clearly only one small piece of a massive galactic history:
The Brotherhood of the Sith had annihilated the Cron Cluster in a supernova, sending a massive shockwave towards the planet Ossus. Home to the Jedi for countless generations, Ossus safeguarded vast libraries and storehouses of artifacts.
As the Jedi scrambled to save their treasures from the coming cataclysm, the Sith Brotherhood leaders Exar Kun and Ulic Qel-Droma arrived to raid the planet. Exar Kun managed to claim a number of notable Jedi artifacts. Meanwhile, Ulic fought against the Republic and Jedi forces only to be challenged by his own brother, Cay.
The two brothers fought until Ulic finally struck Cay down. The shock of his brother's death left Ulic stunned with horror. The Jedi Nomi, who had once loved Ulic, was overcome with grief and used her tremendous powers to somehow sever Ulic's connection to the Force. Left powerless, Ulic wept at what he had become.
|~ Star Wars: The Old Republic, Galactic History 60: The Destruction of Ossus codex entry|
This codex entry is unlocked upon interacting with a datacron. Start your way at and follow the wall all the way around.