Sith Lords are powerful users of the Dark Side of the Force in the Star Wars universe. They are often characterized by their ambition, ruthlessness, and mastery of dark powers, seeking to dominate the galaxy and defeat the Jedi. Notable Sith Lords include Darth Vader, Darth Sidious, and Darth Maul, each with their own unique abilities and tragic backstories. The Sith operate under the Rule of Two, which states that there should only be two Sith at any given time: a master and an apprentice. This ensures that the dark teachings are passed down while preventing infighting among the Sith, making them a formidable threat to the Jedi Order and the galaxy at large.