Kaon Warding

Ileyria tells you, "As Shae may have told you, we are attempting to create a ward that will dispel the Kaon from this plane. The fairies that are corrupted by Kaon may hold the key to such a ward." "Go to the southwest, and kill the fairies that reside there. Bring me some Kaonic wing fragments, and I'll see what I can do with them."