The Cerean Mystics were an organization of Force-sensitive Cereans based on their species' homeworld of Cerea who claimed to follow the Force's will. The Hierarch of Cerea, the leader of the planet, was also the leader of the organization, as the hierarch had to be Force-sensitive. The organization was formed in 6500 BTE, by the renowned Si'a Tiar, who, according to legend, single-handedly fought off the Jedi Order in their attempt to conquer the planet.