GWENT is a game first introduced in witcher single player games and afterwards developed out as stand alone game. It's a turn based game just like Hearthstone but I find it much more appealing. There is no such thing is hardcore pay to win (p2w) content. You can get top decks in one month of intense gameplay with one faction. You can invest money in game to buy cards or dust to animate them but in general, you can play free and still be top player.
You can check out game here: https://www.playgwent.com/en
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You can check out game here: https://www.playgwent.com/en
Example: