Cute and enjoyable card game. Becomes pay-to-win eventually as most mobile games do. The best cards are crafted from other cards, and you need a lot of cards to get them. The easiest way to get more cards is to spend money. You get a lot of cards early to boost your collection and to get you hooked on opening packs then it slows down. Pretty obvious that the developers are looking for cash shop whales but if you're looking for a fun casual game that's easy to pick up you can't go wrong.