Originally Posted by
Teotimus
Since I'm also quite interested in seeing the Ars Magica mechanics implemented in MoreCore:
Yes, stress rolls are always d10.
2-9 are read as standard results. They are added to a Skill/Attribute for a dice total, so ideally the output should be just the roll or the roll + Skill/Attribute (if it's possible).
Ideally, the output should be something similar to "XXX botched the roll", stating the number of 0s. So, if two 0s were rolled, it should be: "Tel Arin botched the roll (2 0s)", or similar.
In this case (there are not 0s in the botch roll), the first 0 in the original roll is considered just a 0, and does not add anything to the roll (so, it's just the same as 2-9, above).
Hope that this helps!