Two or three decks per faction, from the first one you can put together to the endgame one. Each level only uses cards you can actually have at that point in the adventure.
Tick the cards you own in the catalogue: each deck will then show what you are missing and what to use instead. Open the catalogue
First deckStarter deck and purchases, no heroes
The starter deck minus its weakest cards, topped up from Elsa and Bram in White Orchard, then Crow’s Perch, Claywich and Midcopse to get the Commandos and Dragon Hunters in threes. Foltest Lord Commander of the North, sold in White Orchard, clears weather: no need for Clear Weather.
22 units · 3 special cards · total strength 116
Seasoned deckAdds the heroes from quests and named players
The Gwent quests of Velen and Novigrad bring the heroes: Vernon Roche, John Natalis, Esterad Thyssen, Geralt, Ciri, Yennefer, and the Mysterious Elf, a spy that gives the opponent nothing. Four spies in all to win the card-count war.
22 units · 7 heroes · 6 special cards · total strength 138
EndgameAdds random duel rewards and Hearts of Stone
The units of Game8’s endgame deck: add Philippa Eilhart, a random duel drop, and Olgierd von Everec, won in Hearts of Stone. Four spies and tight bonds in threes, with two Commander’s Horns to double the row that matters, plus the Decoys Game8 leaves out.
22 units · 8 heroes · 5 special cards · total strength 143
The endgame decks follow Game8’s and, for Skellige, the deck GamerGuides recommends for the tournament quest. The others follow the deckbuilding rules the guides agree on: exactly 22 units and few special cards, because you only draw 10 cards for three rounds.