I came across this packet effect, which used a gimmicked card to transform a royal straight poker hand into four aces. But the effect was both too simple/short, and (when presented per the manufacturers instructions) not very deceptive. However, the cards can be used for a Princess-style card routine, where the magi divines which of five cards is thought-of by the spectator -- plus, you get a kicker ending where the other cards all change to Aces. Much better!
So I created and write up a new handling to use these cards, and Princess Aces was born. You can only get it here at TMGS.
Effect: magician shows five cards, which he spreads facedown in a vertical line-up (like in the photo), then turns them faceup to show five different values -- 10S, JH, QS, KH and AC (a royal straight, for the poker players out there). The spectator is allowed to think of any one of the card (no force), and after she does, the magi turns the packet facedown again, gives the cards a bit of a mix, and takes one out, placing it into his pocket unseen. The other four cards are handed to the spectator to hold facedown. She now names her thought-of card and the magi says "I knew it!" He takes the card from his pocket, showing it to be the one she thought of. "No one ever thinks of the other cards, because Aces seem to obvious!" She looks at the four cards she holds, and they have changed into the four Aces.
The cards have red Bicycle style backs, but they are NOT printed by the US Playing Card Company. The card stock quality is not as good, but is adequate for the effect and method. (I recommend using the one primary gaff supplied with all other cards coming from your own regular Bicycle deck.) Also, the red back color is slightly different than USPCC red backed Bicycles, but lay audiences will not notice this for the short time the gaff card is in play.
You get necessary gimmicked card, plus matching cards, but I recommend using the gaff with your own red-backed Bicycle poker deck. You also get the exclusive TMGS instructions, of course.