Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy. You may unsubscribe at any time. Part of Dungeons and Dragons’ enduring charm is the game’s seemingly infinite possibilities. Players may start on a quest to slay a villainous dragon, only to spend hours of their campaign helping a local village deal with a vengeful necromancer. But no matter where the story goes, everyone’s choices are influenced by rolling a lot of dice. The roleplaying game is particularly famous for its reliance on the 20-sided die, but there are all types of sizes depending on the situation. That said, the situations when someone might need to toss a 120-sided variant are few and far between. However, a collective of game designers called The Mint Tin Guys decided to make just such an accessory available for D&D fans. But why …