Hunting Horn
The Hunting Horn, a weapon to inspire hunters to let go of fear, as you can play special songs with certain notes, and temporally boost the abilities of yourself or anyone else in the area. While its a musical instrument, its also a form of Hammer, and can knock out enemies in the same fashion as a Hammer. However you cannot charge your attacks, and you must retreat to a safe spot to play music and regain the abilities that have expired during battle. The Hunting Horn doesn't allow blocking, but you can still attack while playing music, just remember that you should be more cautious in higher ranking quests as you lose mobility while playing and getting hit is above all the worst thing that can happen in a higher ranking quest.