A Certain Magical Index: Imaginary Fest, recently announced by Square Enix is a free-to-play game with item based microtransactions. It will be showcasing characters of the same name in anime, light novel, comic and movies. Reliving all the scenes with powerful techniques portrayed in 3D.
Build your most powerful decks of any of your favourite characters in the series. It will be available for the iOS and Android. No further announcements have been made yet so stay tuned.