This is the image that will go on the back of each playing card. I included the reversed version in this pic. The idea was to have something that looks okay when held upside down. I listened to your ideas too. A color version of this pic should appear on the card box. I chose indigo for the color. Since the back needs to be quickly distinguished from the fronts, I went monochrome like I did with the tarot deck.

The characters shown here are Kelvin, Orange, Jith, and Nivlek.