Exar Kun

In the early stages of the conflict, Kun traveled to the Jedi library world of Ossus, murdered the Jedi Keeper of Antiquities, Odan-Urr, and took possession of a rare Sith holocron. Kun then took several prospective Jedi followers back to Yavin 4, where he used the holocron's power to corrupt them and reshape them into his Brotherhood of the Sith. Kun sent his Brotherhood out into the galaxy to kill their Masters and wreak havoc. At the same time, he headed to the Republic capital of Coruscant to rescue Qel-Droma, who had been captured after launching an ill-advised attack on the planet.