I've killed Circe as the note says - three times now, once while a pig (she got me with the curse), once via a summoned iron golem, and once by stabbing her through a hole in a temporary fortification I built for the fight - but nothing has happened; no unlocks, no message, nothing. Am I doing something wrong? Do I need to have the note in my inventory when I kill her? Is it no longer an actual quest?

If I'm not doing anything wrong, is it a glitch or am I supposed to unlock magic some other way? Please advise; I'm otherwise having a blast with this pack and I want to start with the wizardry!

EDIT: For the sake of anyone else having a similar problem in the future, it finally worked and unlocked Ars Nouveau once I killed her with just a plain vanilla sword - enchanted as heck, but still, sword. Don't get fancy, I guess.