Can You Combine Decks?

[Nohwear]

Can you combine multiple copies of the same class decks in order to use more copies of the same card then are in one deck?

[First World Bard]

Not in organized play, no.

[Andrew L Klein]

In organized play, you use one deck, with a character from that deck (or an official character from the standard game that shares its class with that deck).

You can sometimes earn the ability to gain more options, for example completing adventure 1 in OP allows access to using Jirelle from S&S with a specific class deck.