Don't get this post. Calveit pulls a card (one from 3). Damien at a very expensive 11 provs resets that ability. Letho copies Damien. I mean, it's possible, but it's expensive and there's a LOT of cards will easily stop/remove them such as Thunder, Shackles, etc.
I'd be more inclined to complain about how HARD it is to get Damien and Letho to work, because of the insane amount of removal in Gwent. But then again I've already complained about removal 3,742 times.