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The '''X-Men OverPower''' expansion debuted in January 1999 with 200 cards ''(38 [[Character Cards]], 126 [[Special Cards]], 4 [[Universe: Ally|Ally Cards]], 5 [[Location Cards]], 4 [[Tactic: Aritifact|Artifact Cards]], 23 [[Aspect Cards]])''.==Distribution==Cards were distributed in:* Booster packs of 15 cards* Booster boxes of 36 booster packs==New Special Card codes==With the '''X-Men OverPower''' release, the following Special Card codes were introduced: [[FF]] [[FG]] [[FH]] [[FI]] [[FJ]] [[FK]] [[FL]] [[FM]] [[FN]] [[FO]] [[NG]] [[NH]] [[NI]] [[NJ]] [[NK]] [[NL]] [[NM]] [[NN]] [[NO]] [[NP]] [[NQ]] [[NR]] [[NS]] [[NT]] [[NU]] [[NV]] [[NW]] [[NY]] [[NZ]] [[OA]] [[OD]]==New card types==[[Aspect Cards]] were introduced.