Yes, Monster (singular) deals three damage, I wrote this to be played as a horror/exploration game with a lot of storytelling (if that makes any sense) so rules for combat are very few and probably a bit unfair.
You have only 3 attributes Body, Mind, and Senses. Your hit points are equal to your Body attribute and you can reroll dice as many times per game as your Mind attribute.
I never found a good way to describe this but I wanted the Guide to have a bigger role in the game, they could get some backstory or maps before the game If you want to play It as exploration/mystery or they could fill in descriptions for Narrator during the game If you want to go for more storytelling.