Onslaught is a
fictional character that appears in
comic books published by
Marvel Comics. The character first appeared in cameo
X-Man #15 (May 1996), his first full appearance in
X-Men vol. 2, #53 (June 1996). Onslaught was co-created by writers
Scott Lobdell,
Mark Waid, and artist
Andy Kubert. He was written and introduced as a villain that was part of the effect of events in the 1993
Fatal Attraction storyline. Onslaught's introduction into X-men storylines caused its own cross over event across multiple Marvel comic book titles (several Fantastic Four issues, X-men and Uncanny X-men issues, and the Cable issues).