The master league mode puts you on the long road to glory by playing matches in an effort to win money for purchasing better players. (snackbar-games.com)
You are able to practice or play matches against bots, but as you'd expect this is an entirely online affair. (androidcentral.com)
You may do that via in - app purchases, but you don't need to; keep playing matches of this collectible card game online to earn extras instead. (cnet.com)