The Jackal is an alias used by two supervillains appearing in American comic books published by Marvel Comics, usually depicted as enemies of the superhero Spider-Man. The original and best known version, Miles Warren, was introduced in The Amazing Spider-Man #31 as a professor at the fictional Empire State University. Later storylines established him as also being a scientist researching genetics and biochemistry, and revealed an unhealthy romantic obsession he had developed for Gwen Stacy. Driven mad with jealousy and grief after Gwen's death, he creates the Jackal alter ego to seek revenge on Spider-Man, whom he holds responsible. To this end, he trains himself in martial arts and builds a green suit and gauntlets with claw-like razors. Although the Jackal initially did not possess any superpowers, he later gained enhanced strength, speed, and agility by mixing his genes with those of an actual jackal.