"You need zinc. It does both, and I'll find an available spike as soon as I can.

Speaking of which, it's worth considering introducing you to the Canton of Inquisition and the rest of my forces. Since we might well be fighting a war against all fairies soon, it'd be useful for people to know it's not actually all fairies. The downside is that as soon as they find out why fairies are dangerous anyone with a brain and a half might suspect something."