The 'Spoony Bard's Harp weapon from Final Fantasy...er...2? 4? Can't recall which it was but everyone want a musical instrument to shoot notes of death at your enemies?
That was 2.
Another good item from FF2: The Spoon. Single-use reward that when thrown by a rogue inflicts the largest amount of damage that the game can process, much like the Spoon which did 9999 damage when thrown by Edge, the ninja.