'I tried to tell him. I did. I told him it was a stupid plan. 'There are hundreds of other ways you could stop this wall from being built. You don't NEED to turn into a female horse to distract the stallion.' It's not my fault he didn't listen, and it's *definitely* not my fault he rolled a damn 20 and is now pregnant with the stallion's child!"
Just to add to this head canon of yours, we’ve found ancient Egyptians dice of various side numbers as well as a 20 sided dice with Ancient Greek characters on each face. While yes the most likely thing is that they used it for gambling, it definitely can’t hurt the head canon to know they had dice that fit modern dnd standards
All mythologies are just kooky D&D campaigns.