Fiendish Codex I: Hordes of the Abyss

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Fiendish Codex I:

Hordes of the Abyss

Type Sourcebook
Code/ Abbreviation FCI
Edition Dungeons & Dragons 3.5
Author(s) Ed Stark, Erik Mona, and James Jacobs
First Published 2006

Fiendish Codex I: Hordes of the Abyss is an optional supplemental source book for the Dungeons & Dragons roleplaying game.


Chapter 1: Demonic Lore

The first chapter explains a number of well known aspects of demons, including their physiology, their interactions on the Material Plane, the roles they fit into, and how possession works. Also given are details on the Black Scrollls of Ahm.

Chapter 2: Demons

The second chapter discusses the difference between the three main subtypes of demon: loumara, obyrith, and tanar'ri. Also included is information on sixteen different types of demons: armanite, bar-lgura, broodswarm, bulezau, chasme, dybbuk, ekolid, goristro, guecubu, lilitu, mane, molydeus, nabassu, rutterkin, sibriex, and yochlol.

Chapter 3: Demon Lords

This chapter discusses the following fourteen demon lords: Baphomet, Dagon, Demogorgon, Fraz-Urb'luu, Graz'zt, Juiblex, Kostchtchie, Malcanthet, Obox-ob, Orcus, Pale Night, Pazuzu, Yeenoghu, and Zuggtmoy. Their statistics are given at lower Challenge Ratings than in previous books such as Book of Vile Darkness, ranging from Juiblex at CR 19 to Demogorgon at CR 23. The chapter also provides tips on advancing the demon lords so that they can be as powerful as you like.

Chapter 4: Trafficking with Demons

This chapter discusses various ways of interacting with demons, from fighting them to allying with them. Included are feats and spells related to demons and demon-hunting.

Chapter 5: Into the Abyss

This chapter features a general overview of the Abyss, and includes descriptions for fifteen layers of the Abyss (including the realms of the above-mentioned demon lords).


There are three appendices: I features a list of all known demon lords; II features a list of all known layers of the Abyss; and III features a list of all known types of demon, sorted by their Challenge Ratings, which are updated to 3.5. Appendix III also includes the books from which they originated.


  • Stark, Ed, James Jacobs, and Erik Mona. Fiendish Codex I: Hordes of the Abyss. Renton, WA: Wizards of the Coast, 2006.

External links