The Dark Council consisted of the highest-ranking members of Darth Batar's Order of Dark Jedi. They searched the galaxy for Force-sensitives and decided who got into the order. Anyone who refused to join was killed. They were also known to kill members to keep their power, as Sac Sak did. They basically ruled the order and Batar played little part in the control of his order. They often did little fighting and were the most common survivors because of their traitorous nature.