Sith Overlords were the leaders of the Sith species. They battled against each other regularly to achieve the superior title of Sith'ari, although after the reign of Darth Bane and creation of the Rule of Two, that term began to be known as god- or prophecized one, and the Sith Overlords died away. Such Overlords were Adas and Dathka Graush. The Massassi caste was one of the most usual to gain this title, although the Kissai caste sometimes battled with the dark side. They stayed in power over several planets from about 100,000 BBY to about 25,000 BBY, but were primarily sedentiary and rarely strayed from they're home planets of Korriban and Ziost.