More on selecting consequences:
Quote from: Your Story: 265
"If a consequence or permanent change is appropriate, the complexity of the spell must account for the target’s ability to resist, his stress track, and the level of desired consequence. This can lead to very large numbers if you want a sure thing. Inflicting a mild disease on a fairly hale target—say, Good (+3) Endurance—would be a 13 complexity spell: 7 to match the best Endurance roll possible, 4 for the target’s stress track, and 2 more for the mild consequence."