Many mythological creatures have equally as mythological weaknesses. Holy water for vampires. Fire to trolls. Mirrors to medusas. That kind of stuff. But what if you're a GM in a game and you want to switch that up a bit? Throw in a baddie that has a particular weakness that you want your players to have to figure out? That's where Banes comes in. It's a new book from Sergeant Nerd Games that gives rules for implementing weaknesses for monsters and tips on how to spread that info around in your games.