Darth Nefarious was a Sith Lord and successor of Bane's lineage. At some point between Darth Zannah and Darth Cognus becoming Dark Lords of the Sith, Darth Nefarious claimed the title after the "untimely" demise of his master. From apprenticeship until, and even through, death, Darth Nefarious was a powerful individual. He had constructed himself a fortress deep in the vast jungles of Ronu II, and was a strong advocate of Bane's Rule of Two.