When standard dungeons do not pose much of a challenge anymore, your experienced heroes may want to go deeper, looking for greater rewards. Once all of your characters reach 5th level, you will want to start using this book!This is an expansion to Four Against Darkness designed for character levels 5 to 9. It includes;using a d8 for combat and savesnew monster reactionsnew, more powerful, monstersexpert skills that your characters can learnnew spells for wizards and elvesrules for madness, vampirism and lycanthropydetails of hirelings and professionals your party can hireplots for campaigns to link a series of dungeonsupdates to all charts, including new monsters, encounters and treasures.Take your party into the Abyss and step into the tier of experienced adventurers!