Dane Whitman is a fictional character in the Marvel Comics universe, first appearing in "The Avengers" #47 in 1968. He is known as the superhero Black Knight, inheriting the title from his uncle, Nathan Garrett. Dane is a skilled swordsman and possesses a mystical sword called the Ebony Blade, which grants him various powers. In addition to his combat skills, Dane Whitman has a background in science, particularly in genetics. He often grapples with his family's dark legacy, as his uncle was a villain. Over the years, he has been a member of various superhero teams, including the Avengers.