A while ago I wrote this post ‘Die from Two Dice‘. Basically it’s a method to make a new ‘die’ by rolling two dice (think D100 but instead of rolling two D10s, rolling two other kinds of dice e.g. a D4 and D6 to make a D24).
At one point in the post, I mentioned that like ‘percentile dice’ where one dice has 10, 20, 30 etc. on it and the other has 1, 2, 3 etc. on it, you could do the same thing but with other kinds of dice. You’d then simply need to sum the faces.
I had a go at drawing out what a set of these ‘composite dice’ might look like:

Method: In each case the white face tells you what ‘normal’ dice you roll this die with to make the composite dice; and to figure what kind of composite dice you are making simply multiply the white face number against the type of die you are rolling.
So:
- the top left option is: Roll this with a D20 and you’ll make 2×20 = D40
- The next black option is: Roll this with a D20 and you’ll make 3×20 = D60
- the first red option is: Roll this with a D12 and you’ll make 2×12 = D24.
Incidentally, the last two options could give you a time in minutes and hours.
Theming the colours should aid people to use them, so the black dice above are always used with a D20 etc. Taking this further, the complete set of dice might also include the ‘normal’ dice, so: normal D20 (in black), normal red D12, normal orange D10, normal yellow D8, normal green D6, normal blue D4 and a normal purple D3. The bolded ‘normal’ options need some thought, as they could get muddled with the dice above. Perhaps the normal dice are all white except for the maximum number which is the set colour e.g. white D10 with the 10 face being orange … or something.
In the above I stuck with D4s, D6s and D10 polyhedrals as they are common and the faces are not too small to print on. But in theory any two dice could be combined e.g. D12xD20 to give a D240 etc.
Kickstarter anyone …. ?
– – –
Me on DriveThruRPG; if you liked this, perhaps purchase one of my PWYW products, as a sort of ‘tip jar’ … perhaps In the Heart of the Unknown.