The City of Heroes CCG was discontinued in February 2007 as it "did not reach critical mass"[1] according to AEG CEO John Zinser.

Because powers had to be recharged before they can be used again, it was possible to get into a state where a number of turns had to be spent simply getting back into a position from which one can again attack.

These icons represented a fixed minor effect which could be utilized by discarding the card, instead of playing it normally.

The data was then processed into a PDF file which could be printed out and used in official play (including in tournaments).

This was not considered exploitable because all heroes created using this system were presumed to be balanced appropriately.