Codex/Galactic History 82: Darth Traya's Return

The Galactic History 82: Darth Traya's Return codex entry is located within the Achievements:Datacrons section of a player's codex once it has been unlocked.

Codex entry
"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:

While seeking out the last surviving Jedi Masters, the Jedi Exile had learned much. Although the Exile had been deafened to the Force, this condition was not a punishment by the Council for fighting in the Mandalorian Wars; it had been caused by the millions of deaths at the battle of Malachor Five.

Knowing the Exile was haunted by Malachor, Kreia–taking up the mantle of Darth Traya again–returned to the planet. The assassin Darth Sion also returned there to face the Exile, but he was defeated, persuaded to release his unnatural hold on life.

Finally, the Exile dueled Darth Traya–who claimed that, despite her betrayal, there was no ill-will between them. To Traya, the Exile represented freedom from the Force, which Traya had come to despise. With Traya’s death, the Exile left Malachor Five for the last time, and the Sith Triumvirate was defeated."