Tabletop gamers know the feeling all too well: you sit down for a night of adventure, pick up your trusty dice, and... they betray you. Roll after roll, your d20 refuses to give you anything higher ...

The D20, or twenty-sided die, is most commonly known in the shape of a regular icosahedron. It’s a fantastic, enchanting geometry, and one that has held the balance of fate in innumerable ...