"Sauron was become now a sorcerer of dreadful power, master of shadows and of phantoms, foul in wisdom, cruel in strength, misshaping what he touched, twisting what he ruled, lord of werewolves; his dominion was torment. He took Minas Tirith by assault, for a dark cloud of fear fell upon those that defended it; and Orodreth was driven out, and fled to Nargothrond."
About Sauron
J.R.R. Tolkien (Christopher Tolkien ed.), Quenta Silmarillion: Of the Ruin of Beleriand and the Fall of Fingolfin, The Silmarillion