This is definitely one of the mini expansions that's a must have for Talisman. If you don't mind werewolves being in your play experience (I love 'em) then you should definitely pick this one up. You can get turned into a lycanthrope and that has an effect on your stats. There is a werewolf piece that also gets a die roll that other players get to roll. It's just another way to make the world of Talisman dangerous and it's good fun. The werewolf piece is beautiful looking.
The other mechanic I love about this expansion is the night and day cycle. ALL monsters on the board are stronger at night and weaker during the day so it adds another element to plan for while you make your way around the board.