D&D in Ptolemaic Egypt

What were they doing with 20-sided dice? Here is one speculation:

The symbols for eta, theta, and epsilon can be clearly seen. Maybe it was used to determine which frat the ancients were going to pledge, but I’d like to think it was used to roll for hit points for warrior and sphinx classes. Now all we need is for someone to 3D-model this so we can print it out and make up our own ancient Egyptian version of D&D.

I suspect some kind of divination tool myself.