Vault of the Onyx Citadel (adventure)

This article is primarily or only relevant to Pathfinder First Edition.
The subject of this article exists in or is relevant to the real world.
From PathfinderWiki

Pathfinder Adventure Path #120:
Vault of the Onyx Citadel
Vault of the Onyx Citadel
Author(s) Larry Wilhelm et al.
Publisher Paizo Inc.
Price Print: $24.99
PDF: $19.99
Released July 26, 2017
Type Adventure Path issue
Binding Softcover
Pages 96 pages
ISBN ISBN 978-1-60125-952-3
Rules set PFRPG
Series Pathfinder Adventure Path #120
Ironfang Invasion 6 of 6
Follows Prisoners of the Blight
Precedes The Lost Outpost
Extras Onyx key stat block
Artwork from Vault of the Onyx Citadel
This article covers the Ironfang Invasion adventure path issue. For the location, see Vault of the Onyx Citadel.

Vault of the Onyx Citadel, an Ironfang Invasion adventure written by Larry Wilhelm, with supporting articles by Crystal Frasier, Greg A. Vaughan, Tim Hitchcock, Paris Crenshaw, and Kalervo Oikarinen, was released on July 26, 2017.

Assault the Vault!For months, the merciless Ironfang Legion has struck out against humanity from its impenetrable, otherworldly Onyx Citadel! But now in possession of a key to this stronghold, the bold adventurers must rally their allies, breach the barrier between worlds, tame an alien wilderness, and finally bring the fight to their hobgoblin conquerors! Can the heroes best the Legion's most devious commanders, including the unparalleled warrior-general Azaersi, or will they fall as readily as their homeland before hobgoblin blades?

This Pathfinder Adventure Path volume concludes the Ironfang Invasion Adventure Path and includes:

  • "Vault of the Onyx Citadel," a Pathfinder adventure for 16th-level characters, by Larry Wilhelm.
  • Suggestions for continuing the campaign beyond the adventure's end, including a gazetteer of the Vault of the Onyx Citadel, by Crystal Frasier.
  • An ecology of the Vault Keepers and the mythic Vault Builders, who together compose the xiomorn race, by Greg A. Vaughan.
  • Details on the powerful xiomorn-crafted relics adventurers may find when exploring the Vault of the Onyx Citadel, by Tim Hitchcock.
  • A bestiary packed with elite Ironfang Legion troops and denizens of the Plane of Earth, by Paris Crenshaw, Kalervo Oikarinen, and Larry Wilhelm.


This section is a stub. You can help us by expanding it.

Foreword: "Extra Shiny" by Crystal Frasier (2)

Vault of the Onyx Citadel by Larry Wilhelm (4)

NPC Gallery by Thurston Hillman (56)

Continuing the Campaign by Crystal Frasier (64)

Ecology of the Vault Builders by Greg A. Vaughan (70)

Relics of the Vault Builders by Tim Hitchcock (76)

Bestiary by Paris Crenshaw, Kalervo Oikarinen, and Larry Wilhelm (82)

Adventure overview

  • 16th
  • Location(s)
  • Plane of Earth
  • Onyx Citadel