Underdark Adventure Guide

The Underdark Adventure Guide details the strange, alien world of the underdark. The underdark is far more than just dungeons and caves. It is a veritable underground continent, populated by advanced civilizations, ancient ruins, sunless seas, alien magic, bizarre creatures, and the horrid denizens of the gloom. The standards of the surface world hold no sway in the underdark, and its mysteries, ferocity, and danger will challenge even the hardiest of adventurers. This book uses the 3.5 edition of the d20 rules set, and is fully compatible with the world’s most popular role playing game.