"The d120 can be used as a dn, where n is any proper factor of 120. For the standard seven-dice polyset, a d120 is the ideal "multi-die", as 120 is the least co

"The d120 can be used as a dn, where n is any proper factor of 120. For the standard seven-dice polyset, a d120 is the ideal "multi-die", as 120 is the least common multiple of 4, 6, 8, 10, 12, and 20." - http://thedicelab.com/d120tables.html http://thedicelab.com/d120tables.html So you could whip one of these out instead of the usual Crown Royale bag full of a zillion different dice if you wanted to have a minimalist flair at your regular gaming session. Mostly though I think it's just a cool thing to add to that bag full of dice. You're playing these games in part to fantasize about collecting lots of pretty gems, and this is like adding a big diamond the size of your fist to that collection of little rubies and sapphires.