Hellboy Universe
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The Hellboy Universe is the fictional universe of the Hellboy comic and its various spinoffs, created by Mike Mignola. Its first appearance was in a black-and-white, four-page promotional comic by Mike Mignola with a script by John Byrne published by Dark Horse Comics in San Diego Comic-Con Comics #2 (August 19, 1993), distributed at the San Diego Comic-Con. The Hellboy Universe currently spans over eighty trade paperbacks. It is also sometimes informally called the "Mignolaverse".