Nathan Garrett is a fictional character from the Marvel Comics universe, primarily known as the supervillain Black Knight. He first appeared in The Avengers #47 in 1968. Nathan is often depicted as a rival to the original Black Knight, Dane Whitman, and has a complex history involving family ties and conflicts over the mystical sword, Ebony Blade. Garrett is characterized by his use of advanced technology and weaponry, often employing a suit of armor that enhances his combat abilities. His motivations typically revolve around power and revenge, making him a recurring antagonist in various Marvel storylines.