Because apparently no-one else can be bothered...
I've found the spell to rid us of the purple blotches. I'm sorry if I didn't get to it quickly enough for some people, but honestly, can't you ever do anything for yourselves? Do you expect that I'm going be around for the rest of your lives, always with the right answer, necessary spell, needed potion? I won't be - I'll be off living my own life, thank you very much. I suggest you start revising now and perhaps you can catch up a bit.