Hellblazer (also known as John Constantine, Hellblazer) is a contemporary horror comic book series, originally published by DC Comics, and subsequently by the Vertigo imprint since March 1993, when the imprint was introduced. Its central character is the streetwise magician John Constantine, who was created by Alan Moore and Stephen R. Bissette, and first appeared as a supporting character in The Saga of the Swamp Thing #37 (June 1985), during that creative team's run on that title.