"Fiendish Codex I : Hordes of the Abyss" is a 160-page hardcover book published by Wizards of the Coast in 2006 as part of the D and D Supplement Series. Written by Erik Mona, James R. Jacob, and Ed Stark, the book delves into the role-playing and fantasy genre, providing additional content for players and game masters in the Dungeons & Dragons universe. With illustrations included, this book is a valuable resource for those looking to enhance their gaming experience with unique and exciting additions to their campaign. Very good condition
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