In your opinion, and why?
In my opinion, Nilfgaard Gwent deck. Because of their powerful spy cards.
(Not sure if you are talking about in-game Gwent or standalone game)
In game. But I thought the stand alone one was the same. So I guess it isn't.
Nevertheless, it's powerful in the standalone one also.
I think it's the northern realms. If you structure it right it has good defences against all the other decks, and it has the potential seige assets to be utterly overwhelming
What do you think?