Board games

Crit Dice — d6 / d12 / d20 whose top face is a sword, bow or staff

Nine dice: three solids x three glyphs. Every ordinary face is a plain numeral you read at a glance; only the crit face is a picture, so a natural 20 lands as a drawn sword instead of a number. Fair on all nine (opposite faces sum to 7 / 13 / 21). Single-colour, or two-colour from one file on an AMS.