About Marvel Overpower (Onslaught Expansion Set)
This set includes 4 Hero Cards, 18 Special Cards, and 28 Event Cards. The cards were available as random inserts in the following Marvel Comics: Amazing Spider-Man #416, Cable #36, Excalibur #102, Incredible Hulk #446, The Sensational Spider-Man #9, Spectacular Spider-Man #239, 2099: World of Tomorrow #2, X-Factor #127, X-Force #59 and X-Man #20.