Ice Knight's Curse
It is a party quest you get to by talking to the Dimensional Portal in any town.
You will need to guard the cursed person, Jun from Edelstein, to the shrine. Then, you have to beat the Ice Knight.
1.Get a large party for this because some might go ahead, because there are forks in the road that you find and the Ice Knight is tough.
Heads-up: For level 40s, its gives like 25% so do this pretty often.
However ,from what I see in maplesea , nowadays , is rare to find people doing this pq.