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Use your imagination. It's easy to come up with tons of ideas with the use of double backers with different colors. You could try something with a color changing prediction for example.
it is one of those cards that you have incase you ever want to create an effect or make a better method to a trick so you can use them. I can see that particular card being used in a color changing deck routine.
because there r two backgrounds to cards so if u could switch signatures from a white card to a black card instead of red back to blue, it would be way better and fool magicians to. Also, black tigers are bicycle cards and my friend gave me a gaff card for it, yea i know black tiger decks suck but still it's only one with red back/black back double sided card.