User blog:Maimer1882/Metal...

So I have always wondered this. In the series it says there are only three known metals that can wound immortals and kill monsters. And again at this site we only say of the three metals (stygian iron, celestial bronze, and imperial gold.) BUT we also see a fourth metal: silver. It is shown to kill werewolves, earthborn, Nemean Lions, etc... Yet it is shown to be a not important metal. Can anyone clear this up for me?