to the 215 card set there were six promo cards. The six are referred to as the Classic Accidental Inserts. They are all rare to extremely rare. The rarest are the Any Power Teamwork (6A+0+0) picturing Captain America, Spider-man, and Wolverine; and the Tactic Artifact Avenger's ID Card (6I+5A) picturing the Hulk and Wasp. The next rarest are the Basic Universe (6I+3) Xavier Protocols picturing Professor X with several X-Men in the background on computer screens, including Wolverine; and the Any Character Deal with the Devil picturing Emplate and White Queen. The easiest of these rare cards are the Location Krakoa picturing the X-Men; and the Tactic Artifact picturing Nightcrawler/Errol Flynn shape shifting. Image OverPower Released middle 1998. Strange as it may seem, the first set released by Marvel Comics introduced characters that, at that time, were published by Image Comics. Composed of 217 cards, being 19 characters, 126 specials (3 Any Character; 6 for each character, Note: Spawn had a promo card (a 7th special) that came in 2 versions (wrong cut - National give-a-way and the Correct cut - Overpower Legion version). and 3 for each Image character of the Marvel vs Wildstorms. OverPower Card Game#Promo Cards promotional set (Future Backlash, Brass, Daemonite Voodoo, and Wynonna Earp, each 3 specials, except Future Backlash with 6), 4 locations, 38 power cards, 13 universe cards, 4 tactic cards, 1 mission of 7 cards and 6 events for that mission. Sold in 60-card random decks and 15-card booster packs. Characters: Backlash, Curse, The Darkness, Fairchild, Grifter, Grunge, Killrazor, Malebolgia, Overtkill, Ripclaw, The Savage Dragon, Shadowhawk, Spawn, Stryker, Tiffany, Velocity, Violator, Witchblade and Zealot. X-Men OverPower Released January, 1999 was the second set produced by Marvel, and the last OverPower set ever released. It introduced the aspects, designed to make locations more useful. X-Men Overpower cards were cut incorrectly, being slightly larger than the other cards, which made decks mixing X-Men sets and other sets very hard to shuffle without sleeves. Also, the font used for character's names was different. It contained 200 cards, being 38 characters (26 new and 12 variant), 126 specials (1 Any Character and 5 for each new character except four, that have no specials; also, 15 previous characters got 1 new special), 5 locations, 23 aspects, 4 universe cards and 4 tactic cards. Sold in 15-card booster packs. New Characters: Bastion, Callisto, Captain Britain, Cerebro, Crux, Deathbird,