He was initially able to change his appearance at will, but when he became Morgoth's servant, he took a sinister shape. In the First Age, the outlaw Gorlim was ensnared and brought into the dreadful presence of Sauron, who had daunting eyes. In the battle with Huan, the hound of Valinor, Sauron took the form of a werewolf. Then he assumed a serpent-like form, and finally changed back from monster to his own accustomed [human-like] form. He took on a beautiful appearance at the end of the First Age to charm Eönwë, near the beginning of the Second Age when appearing as Annatar to the Elves, and again near the end of the Second Age to corrupt the men of Númenor.