Dark Lady Sauron

Sauron was the greatest subversive Maia, maker of the One Ring, renowned disciple of Aulë, and chief agent and the lover Morgoth in the Elder Days. After Morgoth's ousting by the Valar, Sauron became the second Dark Lady and sought to conquer most of Arda through guileful trickery, with the Rings of Power or with overwhelming armies.