Garthanos
Arcadian Knight
Well, I have levels of success/failure, a check that falls more than 4 points on either side of the DC is either a critical failure (low) or a complete success (high). You can buy a Complete Success for the price of a vitality point, if you are invoking a technique in the challenge (IE a ritual or practice or something similar).
DnD has more of an on off heritage with die rolls except for hit points themselves which then have an on off effectiveness
