Everything about dices
at the moment, these dice are only produced by The Dice Lab, that are section of their "Skew" dice set. The form was decided on as it's unattainable to "skew" a regular icosahedron in a method that the shape remains isohedral (mathematically good). The Dice Lab's Skew d20 When an total is always to be subtracted, the notation is nds-c or nDs-c; so