The Kathol, also known as the Precursors or Cthol, were an ancient race who lived on the planet Kathol. It was believed that they were descendants of the Old Ones, who were the original inhabitants of the Kathol sector. They possessed organic technology and were a highly advanced civilization, proven when they created the Codex. Thousands of years before the Battle of Yavin, several Dark Jedi attempted to conquer the Kathol. They were defeated, but the Kathol were almost wiped out. Most of the Kathol were able to store themselves in the Lifewell, guarded by DarkStryder. Unfortunately, DarkStryder refused to release the Kathol after the danger had passed, and the Kathol were trapped in a form of limbo. Their life force became the mystical Ta-Ree energy.