@HHunter1 You’re describing a D% system, in which case her roll is either 17 or 71 (you’re basically rolling a 100 sided die at that point). Nothing on the chart is above 20 so I doubt it’s that. We’re probably looking at a pool of D10s like Exalted
What you’re describing is fairly popular in Japanese systems and called 2d. But that assumes D6s instead of D10s.
I worked in a game store for years 😛
