CURATOR COMMENT
-~Copyright issues observed and accepted, but video-game inspirations are tricky.
~ = Be careful about making ideas that are directly inspired by other games; while the artwork may be free to use under the site you listed, it might be better to change the 'theme' of the card while retaining the mechanic so that it has a more 'innovative/individual' feel to it, rather than being a bite off another popular video game. >.>