Last night I just bought a deck of Bicycle Dragon Back (BDB) decks and a double back card is included. If all BDB decks are the same, that could be another source of double back cards, if you have the chance to find them, buy some, not just one, like me (I got the last one, I hope they bring some more soon). Here where I live it's difficult to find Bicycle decks other than the classic red and blue decks, so I bought what I could. Maybe any of you have bought some more decks with special cards included and you can tell us which ones to look for. The place where I bought my BDB has some more decks, although expensive ones (Bicycle Green -recyclable decks, pink decks for a cancer foundation, plastic transparent, poker peek pro, etc.) And I just remembered the black Tiger (I think) decks from a few years back had some special cards too. No double backs, but a "misprinted" ace. So if you have info about this, please share.