When you complete certain levels of Illusen’s quests you recieve certain items, below is a list of these items, what level you get them and what they are. You need to remember if you do this quest, you cannot do Jhudora’s Quests on the same day, you see the two faeries are rivals and wont give you quests if you are helping out the other one.
New: We have added some information about each item, enjoy. – Sam
Thanks to snowykittenz for finding many of these images.