It's a competitive card game from The Witcher universe, based on Gwent from The Witcher 3 and it's been growing quite rapidly since closed beta release last year, and can potentially become next big esport card game.
There's currently a $100k tournament going on which you can watch at: https://www.twitch.tv/cdprojektred
You can also sign up for closed beta here: https://www.playgwent.com/en/
Even though card games have never really been my thing I'm really enjoying the game, especially as a big Witcher fan. I think it's mainly the strategy and competitive aspect of it I used to like in SC.
I recommend everyone checking it out!