Folklore Weaknesses Explained

Many wonder why werewolves are weak to silver. It's because all the ones that were weak to pollen died without accomplishing anything. Hope this helps.

An Explanation of the Selection of Monster for the Previous Story

You know, not a lot of monsters have meaningful weakness. Werewolves have silver, which is pretty impractical, and the main problem faced by mummies is that they're boring. No wonder vampires are so popular.