science and magic march on

[marycatelli]

So the fairy folk are vulnerable to iron.  Other nasty beings, to silver.

I was pondering whether some of the unusual folk might be vulnerable to -- oh, platinum.  Or aluminum.  Metals not known until science devised new ways to find them.  An unpleasant surprise perhaps.

On the other hand, I don't know if any creatures are vulnerable to some anciently known metals.  Tin.  Gold, even.  Lead -- I have heard of cases where lead from church windows is dangerous, but not lead in itself.

And then there's the question of whether they are random and wild enough for a proper vulnerability compared to some of the wacky stuff you find in folklore.  A catalog of metals is a bit standardized when compared to such weaknesses as a pentacle, soybeans, or four-leafed clovers.