The extended deck takes the 36 card basic deck and adds some or all of nine additional cards.
The Excuse has no suit and no rank. It is usually treated as a blank, inert card.
The Pawns are a new rank of card, between 9s and Crowns. There are four Pawns. Each one has three suits, with each suit appearing on two of the four Pawns.
The Courts introduce yet another rank of card, between Pawns and Crowns. Just as the Pawns, the Courts are four cards, each with three suits. The Court cards include the combinations of suits that don't appear on any basic deck card (like Moons and Wyrms) but none of the most common combinations (like Moons and Suns).