The Encyclopedia of Villains is a d20 System sourcebook that provides gamemasters a host of villains, ready to use and easily dropped in to almost any fantasy setting. Heroes come in all sizes, shapes and, most importantly, all levels of experience. What could kill a group of second-level PCs wouldn't even last ten seconds against a group of 12th level adventurers. Included in this book are 35 different villains of varying levels of challenge, giving you a wide range of bad guys to throw at your heroes, from their initial steps out into the world and throughout the course of their adventures. But these are far more than just villains to be killed in one sitting. These are individuals that your PCs can come across time and again during the course of their adventures. Perhaps one will hire those intrepid adventurers of yours to retrieve a stolen artifact only to turn on them years later. Or maybe one will just make it his life's goal to rid the world of your PCs!