You next opponent is no other then S igismund Dijkstra at the bathhouse in Novigrad once you’ve met him in the main questline of Witcher 3. Challenge her and win a game of Gwent against her to get the unique Morvan Voorhis card from her. After his defeat he’ll send you to play against Marquise Serenity at the Passiflora in Novigrad. Once you’ve beaten him you’ll receive the unique Vesemir card. The Big City Players Quest can be started by reading the notice board on the Hierarch Square in Novigrad mentioning that Vimme Vivaldi is a Gwent trickster or just talking to Vimme Vivladi at the Vivaldi bank on the same square.
