<P> Nowhere does Tolkien provide a detailed description of Sauron's appearance during any of his incarnations . </P> <P> According to The Silmarillion, Sauron was initially able to change his appearance at will . In the beginning he assumed a beautiful form, but after switching his allegiance to Morgoth, he took a sinister shape . In the First Age, Gorlim was at one point brought into "the dreadful presence of Sauron", but the only concrete hint about his appearance is a reference to his daunting eyes . </P> <P> As part of a plan to destroy Huan, Sauron took the form of the greatest werewolf in Middle - earth's history . When the plan backfired, he assumed a serpent - like form, and finally changed back "from monster to his own accustomed form". The implication is that his "accustomed form" was not, at least, overtly monstrous . It is understood to have been humanoid . </P> <P> Sauron took a beautiful appearance once again at the end of the First Age in an effort 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 when corrupting the men of Númenor . </P>

Where is sauron during the lord of the rings