I just had something occur to me that I want to share.
Strictly speaking, this is for Terry Pratchett fans only, since only they would get what I'm talking about.
So. The Elves in Terry Pratchett are kind of a big deal. They're tough to fight, and virtually impossible without magic and/or lots of iron. But. They also like music. They love it, in fact, and are entranced by it.
I realised you could deal with Elves by playing Music with Rocks In at them. The benefit is twofold, in fact; they would be entranced by the initial performance (much moreso than more traditional kinds of music, since the inherent spectacle of Music with Rocks In is even greater), and then would be rendered relatively harmless by the transformation the music engenders in people.
Either that, or they'd turn into even more terrifying versions, perhaps some kind of Death Metal Elf. Still, an amusing image nonetheless.