
In fiction and mythology, a dark lord (sometimes capitalized as Dark Lord or referred to as an evil overlord or evil emperor) is a powerful villain in fantasy or science fiction stories who rules over evil forces and wants to control or destroy the world.
They seek total power, conquest, or complete destruction.
They usually possess dark magic, ancient secrets, or super-advanced technology.
They rule over armies of monsters, minions, or villainous henchmen.
They usually live in a dark, dangerous stronghold (like a volcanic fortress or a shadowy tower).
In J. R. R. Tolkien's series of books, Sauron is a shadowy ruler who created the One Ring to control Middle-earth.
In J. K. Rowling's series of books, Lord Voldemort (born as Tom Marvolo Riddle, and also known as "He-Who-Must-Not-Be-Named", "You-Know-Who", "The Dark Lord", or "Tom") is a dark wizard who seeks to conquer both the magical and non-magical worlds.
In George Lucas' franchise, Darth Vader (also known as Anakin Skywalker) and Emperor Palpatine (also known as Sheev Palpatine, Darth Sidious, or simply the Emperor) are galactic tyrants who rule through fear and the dark side of the Force.