I noticed that the Mary-El card backs have orange and blue ouroboros serpents intertwined in a lemniscate pattern, stylistically echoing the orange and blue twisting dragons on the Fool card. See attached.
Speaking of the card backs, I counted the red "Yods" on the back of the serpents. One serpents has 38 Yods, the other has 39 Yods. 38 + 39 = 77. The Tarot has 78 cards. 78 - 77 = 1. Suddenly the following phrase beamed into my head: "The Missing One is You!"
The "You" is needed to experience the world. The creator experiencing the play of creation. "I am divided for love's sake, for the chance of union." By interacting with the world and tarot, you are actively facilitating and intertwining in the chance of union in unique ways!
I really am going to enjoy and intertwine with this deck!