Every class shares its domains with at least one other class. For example, Blade is shared between Guardian and Warrior, Sage is shared between Druid and Ranger, and Grace is shared between Bard and Rogue. If a fellow player’s class has the same Domain as yours, you’re encouraged to coordinate with them and choose different cards from that Domain Deck (even if your group has multiple copies). This gives everyone a chance to shine with their own special abilities. However, if the GM and players agree, feel free to make an exception. Sharing cards is especially common when more than one player chooses the same class, or when three (or more) players share the same Domain. As always, it comes down to open communication between the players and the GM. If you and another player agree to use the same card, but your group doesn’t have multiple decks, you can download and print extra copies at home.