diseases developing resistance to treatments...
New head-canon:
In The Wandering Inn, at one point the innkeeper has a sore throat (from doing hours of singing) and a cold (from being out in the rain).A mage cures her of the sore throat, but apologizes for not being able to do anything about the cold because she doesn't have a high enough spell.
She explains that the cold is the most common illness, and people have been using magic to cure it from centuries. Now the low level spells won't cure it anymore.
In The Wandering Inn, at one point the innkeeper has a sore throat (from doing hours of singing) and a cold (from being out in the rain).A mage cures her of the sore throat, but apologizes for not being able to do anything about the cold because she doesn't have a high enough spell.
She explains that the cold is the most common illness, and people have been using magic to cure it from centuries. Now the low level spells won't cure it anymore.