Just like hearthstone and any other card strategy game, it's an absolute gem. There are so many combos and strategies to use which makes it such a great game. Sure it does have a large pay wall, but the daily challenges and recurring ranked season is enough to keep you entertained. The offline aspect of it is what kept me playing for so long when I didn't have data. It's sad to see it's been abandoned by the devs and it really could've been so much better if they put more time into it.