MAYBE you have to give the scarf to an elf who lost his and you get a super awesome morph and/or bomb in return-the elf stays after christmas but becomes a boring/non Christmas themed morph/bomb when scarf is turned in....BAM! End that annoying quest and open room to another one BUT make it more interesting like add new kinds of drops to all monsters and turn them in to Finnish the quest or kill a special vampire or something new.