Guide for Travelers, Hunte4rs, and Explorers of the River Kingdoms. Volume 5: Monsters and Beasts

"Will-of'-wisp
An amusing glowing ball, which looks harmless and doesn't arouse any natural suspicion. Pretends to be a guiding light in the marshes, but leads travelers to certain death. The agonizing fear of their victims is this monster's nourishing dinner. If you manage to resist their tricks, make sure you have some electrical protection. The monster electrocutes any visitors it fails to lure into terror.
Werewolf
Werewolves prefer to hunt in groups, and attack lone travelers. It's entirely possible that a Varisian camp or troupe could turn into a pack of bloodthirsty lycanthropes under cover of darkness. Ordinary weapons stand little change against them, but a silver blade greatly increases your chances of survival.
Primals
Powerful creatures of the Primal realm occasionally visit this world for amusement. It's best to stay out of a Primal's way. Don't fight it - it's extremely dangerous. But if a life is at stake, resort to cold steel."