Please, try the following: https://support.cdprojektred.com/en/gwent/pc/contracts-items/issue/728/gog-achievement-didnt-unlock
Didn't get that achievement either while "winning" a game today with this deck. (Yeah my opponent lost connection).
Concerning the previous comment: it's only one of three achievements I don't have and the latest I got was about a month ago.
Concerning the previous comment: it's only one of three achievements I don't have and the latest I got was about a month ago.