Wasn't there 21 cards in this set?
Promo card # 21.

This message has been edited. Last edited by: Ace of Hearts,

It's a 42 card set. There is a 20 card version with cards saying "For Promotional Purposes" with blue text on the back and a "Gone with the Wind" card that says "prototype" instead - all with blue text on the back. There is another version of those with red text on the back.