Sauron, the Dark Lord from J.R.R. Tolkien's Middle-earth legendarium, is a powerful and malevolent entity. Originally a servant of the Valar, he became corrupted by the desire for control, leading him to craft the One Ring. Sauron's presence looms over the tales of 'The Hobbit' and 'The Lord of the Rings,' embodying the struggle between good and evil.