From publisher blurb: This release of The Manual of Mutants & Monsters provides game stats on the gibbering mouther, a creature seemingly born of madness that lives only to feast upon its prey after driving them mad with its incessant, nonsensical babbling. Includes game statistics for the creature, as well as the Slow Fade extra. Rounding out this product are three caper ideas for using this maddening monster in your game.