Don't waste your time. Edit to the devs: the worst part about this game is that I honestly think it's fun at its core. But the system is so predatory and designed to drive you into spending LOTS of real world money I would just have rather never played it at all. I just wish I could play the game without grinding for hours like it's a real job, or spending the money I make at my real job. Even hearthstone feels WAY less predatory and that's saying something. TLDR; game is fun prog is not