Trying to get the highest value on each dice value to blow up to the next dice.
So consecutively rolling a 4 on a D4, a 6 on a D6, an 8 on a D8, a 10 on a D10, a 12 on a D12, and finally a 20 on a D20. 0.000217013% of hitting a nat 20 and being sucessful in this endeavour.