This is a festive themed design for all Dungeons and Dragons lovers. If you have watched the popular show Critical Role you need no introduction to D&D. Also referred to as DnD, it is a popular tabletop role playing game and if you know anyone who enjoys it then they will love this as their Christmas Jumper or T-Shirt.
This design is simply inspired by getting a critical roll, which is roll of a 20 on a 20-sided die. That means it is the highest you can get and I hope you have the best Festive season you can possibly have!