Fear the Frightful Fog! Catch devastating diseases, lose your way in the fog and drown in deadly bogs and marshes. Featuring: swamp mapping rules, fog, new monsters and events, creepy tables, new deities, 12 magic items and 36 spells! Plus, new classes: the stunning Medusine, the mutated Renegade Reptilian, the sneaky Snake Charmer, the powerful Swamp Shaman, the strange Marsh Elves and their six tribes. 100% compatible with the wilderness book range, including Crucible of Classic Critters and More Mountainous Mayhem Requires only Four Against Darkness.