The Forsaken
The Forsaken are 13 of the most powerful Aes Sedai ever to live. They lived during the Age of Legends, at the time of the War of Power. THey all turned to the side of the Dark One, for various reasons. At the end of the War of Power, they were all trapped at Shayol Ghul, imprisoned with the Dark One. They now run free throughout the world (those that are not dead).
Rahvin
Messana
Semirhage
Demandred
Moghedien
Asmodean