The Plane Below: Secrets of the Elemental Chaos is a 4th edition Dungeons & Dragons rules supplement published in December 2009. It builds on the overview of the Manual of the Planes game supplement, providing coverage of Elemental Chaos topics ranging from the City of Brass to the githzerai monastery of Zerthadlun, in a reference that also profiles an array of new monsters, demons and adventure options.
Published: 2009
Author(s): Ari Marmell, Bruce R. Cordell, Luke Johnson
Pages: 158
Cover: hard
ISBN: 978-07869-5249-6