The Sunless Citadel

The Sunless Citadel
Publication	Tales from the Yawning Portal
Date	2017
Publisher	Wizards of the Coast
Type	Adventure
Author	Bruce R. Cordell
Pages	9-31
Edition	5th ed.

The Sunless Citadel is an adventure written by Bruce R. Cordell which is setting neutral with conversion notes for the Eberron campaign setting using the 5^th-edition Dungeons & Dragons rules. It was released in 2017 when it was published as part of the Tales from the Yawning Portal sourcebook.

The adventure notes that the Sunless Citadel is located on the western edge of the Mournland and was swallowed by the earth on the Day of Mourning.

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Eberron Adventures
3^rd edition	The Forgotten Forge • Shadows of the Last War • Whispers of the Vampire's Blade • Grasp of the Emerald Claw • Voyage of the Golden Dragon • Jungle Secrets • Queen with Burning Eyes • Steel Shadows • Fallen Angel • Crypt of Crimson Stars • Temple of the Scorpion God • Pit of the Fire Lord • Murder in Oakbridge • Chimes at Midnight • Tensions Rising • Riding the Rail • The Aundairian Job • Quoth the Raven • Hell's Heart • City of Blood Adapted Adventures: Red Hand of Doom • Expedition to Castle Ravenloft • Expedition to the Demonweb Pits‎ • The Shattered Gates of Slaughtergarde • The Kopru Ruins‎ • Legend of the Silver Skeleton‎ • The Whispering Cairn • The Three Faces of Evil • Encounter at Blackwall Keep • The Hall of Harsh Reflections • The Champion's Belt • A Gathering of Winds • The Spire of Long Shadows • The Prince of Redhand • The Library of Last Resort • Kings of the Rift • Into the Wormcrawl Fissure • Dawn of a New Age • There is No Honor • The Bullywug Gambit • The Sea Wyvern's Wake • Here There Be Monsters
Mark of Heroes	Reflections of the Multiverse • Pirate's Bounty and the Isle of Fire • No Ticket • Finding the Way • Gambit at Dreadhold • Blind Man's Hunt • The Delirium Stone • Freely Given • Mote in the Eye of Chaos • Desolate Endeavor • The Graywall Incident • Escape from Grea Tower • Deep Woods, Dark Heart • House of Madness • Price of Protection • Death in Darguun • Fallen of Sharn • The Unexpected Gate • To Spurn the Churning Discord
Xen'drik Expeditions	The Journey Begins: Well of Woe • Breaching Thelanis Wall: Well of Woe • The Flame Beneath the Well: Well of Woe • Mere of Shattered Souls • Cairn of Stone Hearts • Sands of Fate and Fortune • Shargon's Rage • Taming the Hydra • Nightfall on Sorrowdusk • The Dead of Night • Endgame
Blackwheel Company Faction Adventure	Principal of the Matter • Price of Progress • Marked Man • The Trouble with Pirates • Tarnished Reputation • None Left Behind • Test of Mettle • A Few Good Gnolls • A Plague Upon Your Houses • Pariah • When in Doubt, Charge • The Twentieth Lash
Cabal of Shadows Faction Adventure	The Sahuagin Stone • Shadows Over Stormreach • Khyber's Children • Fire in the Heart of Madness • Night of Shadows • What Rough Beast • Whispers Behind the Door • Racing Midnight • The Darkest Heart • Thirst For Blood and Stone • With His Dying Breath • Dark Portents
Covenant of Light Faction Adventure	Divine Inspiration • Crisis of Faith • The Good Die Young • Brave Soldiers • Things Fall Apart • Price of Virtue • Dark Fugitive • Noble Savages • Choir of Angels • Fate, Interrupted • Greater the Fall • To Live Among You
Crimson Codex Faction Adventure	Prophecy's Unwitting Servant • Forbidden Knowledge • Native Intelligence • Tomb of Tomes • The Korranberg Affair • Turn of the Page • A Costly Truth • If At First • Stormrider Slept Here • Chamber Made • A Shattered Mind's Maze • The End of the Viper's Tail
D&D Open Championship	Shards of Eberron • Crown of Winter Flame • Tomb of Eternity
4^th edition	The Mark of Prophecy • Khyber's Harvest • Seekers of the Ashen Crown • Keep on the Shadowfell • Heart of the Forbidden Forge • Haruuc's Tomb: A Novel Adventure • The Maze of Shattered Souls • Dead for a Spell • Dark Lantern
5^th edition	Around Khorvaire in Fifty Days • Forgotten Relics • Fallen Colossus • Murder on the Halcyon • Race Through Q'barra • Skybridge Skirmish • Vecna: Eve of Ruin Adapted Adventures: Against the Giants • Between Tangled Roots‎ • Danger at Dunwater‎ • Dead in Thay • Gold for Fools and Princes‎ • In the Mists of Manivarsha • Isle of the Abbey‎‎ • Princes of the Apocalypse • Salted Legacy • Tammeraut's Fate • The Fiend of Hollow Mine‎‎ • The Forge of Fury‎ • The Hidden Shrine of Tamoachan‎ • The Sinister Secret of Saltmarsh‎‎ • The Styes • The Sunless Citadel‎ • Tomb of Annihilation • Tomb of Horrors • White Plume Mountain
Embers of the Last War	What's Past is Prologue • Murder in Skyway • Boromar Ball • The Cannith Code • Jack of Daggers • Against the Lightning • A Holy Visit • Blades of Terror • The Kundarak Job • Searching for Secrets • The Killing Blade • Secrets Below
Oracle of War	The Night Land • Voice in the Machine • Where the Dead Wait • The Third Protocol • A Century of Ashes • The Last Word • Song of the Sky • Parliament of Gears • Lord Bucket • Judgment of Iron • My Undying Heart • The Waiting Game • Stonefire • From Dust • Dream Eater • The Dragon Below • The Final Tribute • Scales of War • Back to the Mud • Old Scores • The Iron Titan • Rolling Thunder • The Rising City • The Last War • Hundred-Shard Stash • Off the Rails • Spirit Train • Servants of the Past • Cold Spell in the Frostfell • Journey to Salvation
Keith Baker Adventures	Curtain Call: A Sharn Adventure • Trust No One • Magic Sword: An Eberron Story Seed • The Mourning After • Heart of Stone