It would be very nice if you can lock the Advent materials of FLB like Phoenix. Right now I don't have the resources to bring the bow to skill 20, and I'm terrified that when the event ends, I make a mistake and use one of the materials I would need for the FLB of the bow, making impossible to break the limit for a looooooooooooooooooooooooooooooooooooong time.