[EW spoilers]

We are tearing scales off of Vrtra in order to make charms to protect people against tempering, meanwhile in Garlemald it turns out there's a metal that's so common even poor people can afford radios made out of it and it just blocks tempering? And we never even think of trying to use it? It feels like they needed a way to handwave some Garleans being untempered and never thought of it after that.