Waterdeep: Dungeon of the Mad Mage Undermountain Overview Running the Adventure Area Descriptions Abbreviations Character Advancement Dungeon History A Knot in the Weave The Yawning Portal Adventure Hooks Starting Quests Future Quests Undermountain Secrets Jhesiyra Kestellharp Dungeon Features Alterations to Magic Architecture Elder Runes Gates Illumination
Level 1: Dungeon Level What Dwells Here? The Undertakers Xanathar Guild Wandering Monsters Exploring This Level 1. Entry Well 2. Hall of Many Pillars 3. Slanted Room 4. With Sword in Hand 5. Grell Hideout 6. Undertakers' Watch Post 7. Vampire Haven 8. Bandit Headquarters 9. Plundered Halls 10. Cubicle of Skulls 11. Room of Secrets 12. Hall of Heroes 13. Empty Room 14. Little Box of Horrors 15. Armory 16. Manticore Den 17. Stone Temple Pileup 18. Troll’s Den 19. Ye Olde Feast Halls 20. Beyond the Green Door 21. Hall of Mirrors 22. Empty Room 23. Worg’s Eye Watch Post 24. Halls of Hopelessness 25. Excavation Site 26. Clean Tunnels 27. Hidden Demiplane 28. Grick Snack Watch Post 29. Eye See You! 30. Mad Elemental 31. Delvers' Hall 32. VIP Suite 33. North Dormitory 34. South Dormitory 35. Hall of Rats 36. Lost Halls 37. Map Room 38. Secret Tunnel 39. Big Ears Watch Post 40. Fearful Mimicry 41. Cracked Ceiling Aftermath
Level 2: Arcane Chambers What Dwells Here? Goblins Xanathar Guild Drow and Wererat Gang Fine Fellows of Daggerford Mutated Apprentices Wandering Monsters Exploring This Level 1. Goblin Bazaar 2. Kalabash’s Chambers 3. Halaster Puppet 4. Abandoned Camp 5. Arch Gate to Level 4 6. Music of the Dead 7. Shocking Discoveries 8. Fresco Cross Hall 9. Spider Eyes Watch Post 10. Ooze Temple 11. Midna’s Lair 12. Dwarven Tools 13. Mutated Apprentices 14. Base de Résistance 15. Dusty Throne 16. Partially Collapsed Room 17. Hungry Rust Monsters 18. Cold Storage 19. Giant Spider Den 20. Dead Eyes Watch Post 21. Animated Ballistae 22. Garrux’s Brewery 23. Ruined Dwarven Temple 24. Dead Adventurer 25. Creature Storage 26. Ancient Elven Tomb Aftermath
Level 3: Sargauth Level What Dwells Here? House Auvryndar Legion of Azrok Sea Hags of the Sargauth Exploring This Level 1. Catacombs 2. Dead Explorer 3. Grick Ambush 4. Webbed Tunnels 5. House Auvryndar 6. Temple of Dumathoin 7. Pain and Pleasure 8. Wailing Tunnels 9. Captain’s Grave 10. Caves of the River Coven 11. Recluse 12. Boo-ty Hunters 13. Riverside Caves 14. Stonecarvers' Hall 15. Way to Wyllowwood 16. Crossfire Caves 17. Dangerous Paths 18. Abandoned Cavern 19. Chimera’s Lair 20. Drow Town 21. Azrok’s Hold 22. Barrelstalk Garden 23. Way to Skullport Aftermath
Level 4: Twisted Caverns What Dwells Here? Aboleth House Auvryndar Kuo-toa Fungi Exploring This Level 1. Fungus Forest 2. Jibber-Jabber 3. Death from Above 4. The Alchemist 5. Cave of Crystals 6. Tangled Ropes 7. Mad Wizard’s Retreat 8. Crossroads 9. Alarm System 10. Drider Lair 11. Drow Outpost 12. Bat Cave 13. Zurkhwood Grove 14. Drow Rafts 15. Slippery Slope 16. Grotto of Madness 17. Pick and Chuuls 18. Slimy Alcove 19. Beachhead 20. Kuo-toa Refuge 21. Archpriest’s Chambers 22. Hook Horror Homestead 23. Hook Horror Larder 24. Troglodyte Takeover Aftermath
Level 5: Wyllowwood Magic of Wyllowwood What Dwells Here? Wyllow Valdemar (Tearulai) Goblin Werebats Wandering Monsters Exploring This Level 1. River of the Depths 2. Forest 3. Guardhouses 4. Cloaker Den 5. Inner Forest 6. Wyllow’s Tower 7. Alcoves of the Dead 8. Umber Hulk Tunnel 9. Dragon’s Platform 10. Mossy Stone Bridge 11. We All Float Down Here 12. Werebat Caves 13. Dining Cave 14. Werebat Boss 15. Bat Cave 16. Werebat Caves 17. Vool’s Refuge 18. Abandoned Priory 19. Looted Cloisters 20. Malar’s Tabernacle 21. Abandoned Barracks 22. Mess Hall 23. Desecrated Sanctuary 24. Animal Cloisters Aftermath
Level 6: Lost Level What Dwells Here? Raiders of Clan Ironeye Umber Hulks Exploring This Level 1. Umber Hulk Tunnel 2. Acolytes' Vestry 3. Cleansing Chamber 4. Ransacked Room 5. Looted Reliquary 6. Workshop 7. Library and Scriptorium 8. Park-and-Ride 9. Mustering Hall 10. Royal Armory 11. King’s Walk 12. Mithral Thieves 13. High Priest’s Chambers 14. Grand Vestibule 15. Temple of Dumathoin 16. Heart of the Mountain 17. Priests' Study 18. Hemisphere of Horrors 19. Mountain Shrine 20. Wall of Gemstones 21. Gem-Cutters' Workshop 22. Gem Extraction 23. Stripped Room 24. Arch Gate to Level 2 25. Dwarven Den 26. Sacred Spirits 27. Arch Gate to Level 4 28. False Tomb 29. King Melair’s Lost Tomb 30. Mummification Chamber 31. Rest Area 32. False Halaster 33. Ghohlbrorn’s Grave 34. Refectory Rampage 35. Black Cloak 36. Temple Maintenance 37. Showers and Sauna 38. Wide Alcoves 39. Temple Reliquary 40. Music Hall 41. Privies 42. Hidden Pit 43. Umber Hulk Tunnels 44. Acolytes' Quarters 45. Acolytes' Quarters 46. Blasted Chamber 47. Halls of the Faithful 48. High Priest’s Quarters Aftermath
Level 7: Maddgoth's Castle The Original Maddgoth’s Castle What Dwells Here? Stone Giants Otto the Faerie Dragon Maddgoth’s Homunculus The Caverns 1. Umber Shells 2. Empty Cavern 3. Stone Throne 4. Silt Pit 5. Cave of Echoes 6. Craft Hall 7. Silt Pit 8. Strange Rock Formation 9. Stone Cathedral 10. Xorta’s Flute 11. Disposal Cave 12. Edible Moss 13. Giants' Living Quarters 14. Cave Bear Den 15. Qurrok’s Den 16. Central Cavern The Castle 17. Main Entrance 18. Stone Hallways 19. Southwest Storeroom 20. Northwest Storeroom 21. Northeast Storeroom 22. Southeast Storeroom 23. Courtyard 24. Privy and Bath 25. Maddgoth’s Study 26. Clayworks 27. Dining Room and Kitchen 28. Well-Appointed Halls 29. Southwest Guest Room 30. Northwest Guest Room 31. Northeast Guest Room 32. Southeast Guest Room 33. Slaad in the Octobass 34. Maddgoth’s Suite 35. Cloakroom 36. Records 37. Console 38. Glittering Hall 39. Southwest Chamber 40. Northwest Chamber 41. Northeast Chamber 42. Southeast Chamber 43. Otto’s Den 44. Wizard’s Armory 45. Alchemist’s Laboratory 46. Maddgoth’s Throne 47. Roof and Battlements Aftermath
Level 8: Slitherswamp What Dwells Here? The Ssethian Scourges The Blacktongues Karstis of Dweomercore Exploring This Level 1. Precipice 2. Bullywug Sentries 3. Arch Gate to Level 6 4. Dangerous Shrubbery 5. Dry Cave 6. Reflections 7. Warded Cavern 8. Dweomercore Hideout 9. Temple of the Great Snake 10. Rainfall Caverns 11. Watch Post 12. Fishery 13. Detention Cave 14. Fungal Farm 15. Lair of the Spirit Nagas 16. Lair of the Bone Naga 17. Battlefield Cavern 18. Serpent Gate 19. Yuan-ti Temple 20. Blacktongue Isle 21. Lord of Fetid Obliteration 22. Stables 23. Bullywug Camp 24. Kelp Farm Aftermath
Level 9: Dweomercore What Dwells Here? Arcanaloth Headmaster Wormriddle the Night Hag Evil Students Bone Devil Exploring This Level 1. Entry Hall 2. Trapped Hall 3. Medusa Junction 4. Fresh Water Fountain 5. Portrait of a Mad Mage 6. Reading Niche 7. Workroom 8. Student Dormitories 9. Refuse Pit 10. Where’s Halaster? 11. Student Dormitories 12. Communal Showers 13. Recreation Room 14. Detention Hall 15. Arcanaloth’s Sanctum 16. Magic Cauldron 17. Spellcasting Hall 18. Illusory Walls 19. Ghostly Adventurer 20. Lecture Hall 21. Classrooms 22. Potion Brewery 23. Wormriddle’s Sanctum 24. Halaster Says What? 25. School Supplies 26. Bent Hallway 27. School Meals 28. More Halaster Statues 29. Old Books 30. Dining Hall 31. Halaster’s Secretary 32. Steel-Sheathed Hall 33. Illusion Classroom 34. Transmutation Classroom 35. Necromancy Classroom 36. Wizards' Library 37. Professor Bring 38. “I Just Met a Girl Named Skrianna” 39. Study Hall 40. Empty Room 41. Drop to Level 10 42. Guest Lecturer’s Quarters 43. Dusty Alcoves 44. Dweomercore’s Back Door 45. Halaster’s Sanctuary 46. Detention Area 47. Devil on the Loose 48. Conjuration Classroom 49. Arch Gate to Level 14 Aftermath
Level 10: Muiral's Gauntlet What Dwells Here? Muiral the Misshapen House Auvryndar Wandering Monsters Exploring This Level 1. Shattered Mirrors 2. Secret Hallway 3. Haunted Temple of Lolth 4. Muiral’s Laboratory 5. Dilapidated Rooms 6. Teleportation Statues 7. Halls of Selvetarm 8. The Fate of Falkir’s Fist 9. God-Watched Gates 10. Queen’s Parlor 11. Lolth’s Palace 12. Ballroom 13. Vestibule 14. Guest Apartment 15. Screaming Skulls 16. False Mirror Gate 17. The Dark Seldarine 18. First Blood 19. Interrogation Room 20. Servants' Quarters 21. Giant Spider Hatchery 22. Troglodyte Turf 23. Distant Music 24. Collapsed Areas 25. Auvryndar Hall 26. Spider Queen’s Temple 27. Vlonwelv’s Apartments 28. Hospital and Armory 29. Abandoned Apartment 30. Natural Cavern Aftermath
Level 11: Troglodyte Warrens What Dwells Here? Troglodytes Drow Mutated Trolls Behir Exploring This Level 1. Auvryndar Watch Post 2. Captured Troglodytes 3. Hungry Gnome 4. Loathsome Limbs 5. Trolling the Troglodytes 6. Piercer Cavern 7. Troglodyte Lair 8. Illusory Front Line 9. Contested Caves 10. Troll Tunnels 11. Forest of Stone 12. Drow Battle 13. Freth Refuge 14. Auvryndar Watch Post 15. Cleared-Out Caves 16. Arch Gate to Level 7 17. Behir Lair Aftermath
Level 12: Maze Level What Dwells Here? House Freth Minotaurs Exploring This Level 1. Into the Maze 2. Light of the Dead 3. Dead End 4. Faces in the Fog 5. Demon’s Triangle 6. Special Effects 7. Minotaur Caves 8. Shrine of the Horned King 9. Foggy Caves 10. Webbed Passage 11. Crickets and Bats 12. Guarded Caves 13. Roundabout 14. Dead End? 15. Crickets 16. Web-Filled Cave 17. Demons' Ledge 18. Drow Fortress 19. Spiderwatch Keep Aftermath
Level 13: Trobriand's Graveyard What Dwells Here? Scaladar Bore Worm Zox Clammersham Hobgoblin Raiders Exploring This Level 1. Tunnels and Trenches 2. Vast Cavern 3. Junkyard 4. Pretty Big Hate Machine 5. Scrap Metal Warren 6. Back Tunnel 7. Clammersham Palace 8. Smithy 9. Metal Pools 10. Resting Cave 11. Hobgoblin Base Camp 12. Paradise Lost Aftermath
Level 14: Arcturiadoom What Dwells Here? Fire Giants Death’s Head Phalanx House Freth Exploring This Level 1. Entrance to Arcturiadoom 2. Natural Caves 3. Foyer 4. Prison 5. Side Chambers 6. Statue of Arcturia 7. Statue of Halaster 8. Dwarven Crypt 9. Death’s Head Watch Post 10. Dwarves' Den 11. Smithy 12. Melairkyn Foundry 13. Transmutorium 14. More Scrap Iron 15. Mecha-Halaster 16. Death’s Head Looters 17. Hidden Storeroom 18. Death’s Head Guard Post 19. Storerooms 20. Supplies 21. Night and Day 22. Arcane Scribblings 23. Experiments 24. Empty Classroom 25. Hobgoblin Guards 26. Apprentice’s Quarters 27. Dead Apprentice 28. Specimens 29. Laboratory 30. Hideous Transmutation 31. Illithid’s Assistant 32. Death’s Head Barracks 33. Doomcrown’s Quarters 34. Shrieking Gas Spore 35. Rallying Hall 36. Death’s Head Training 37. Weapon of Mass Disintegration 38. Guest Quarters 39. Arcturia’s Boudoirs 40. Arcturia’s Chambers 41. Watchful Pillars Aftermath
Level 15: Obstacle Course What Dwells Here? Netherskull the Death Tyrant Githzerai Zerths Lava Children and Friends Traps Exploring This Level 1. On Your Mark! Get Set! Go! 2. Clacking Floor 3. Stuffed Monsters 4. Caught in the Tentacles 5. Antechamber 6. Looted Chest 7. Fidelio’s Folly 8. Teleport Trap 9. Hidden Rune 10. Roller-Dragon 11. Dead End 12. Wheel Room 13. Hidden Traps 14. Sepulchers 15. Ruined Armory 16. Spectral Bridge 17. Ruined Chamber 18. Ruined Shrine 19. Grabby Pillars 20. Separated Hall 21. Destroyed Room 22. Teleport Traps 23. Statue of Vergadain 24. Githzerai Retreat 25. Abandoned Smithy 26. Statue of Moradin 27. Mark of Death 28. Statue of Tharmekhûl 29. Trapped Halls 30. Halaster’s Handiwork 31. Hall of Embers 32. Empty Junction 33. Shots in the Dark 34. Chasm’s Edge 35. Scythe-Seeing 36. Looted Vaults 37. Harmless Halaster Statue 38. Zombie Horde 39. Netherskull’s Sanctum 40. Netherskull’s Chasm Aftermath
Level 16: Crystal Labyrinth What Dwells Here? The Original Crystal Labyrinth Githyanki Red Dragons Crystal Dungeon 1. Entry Hall 2. Western Cavern 3. Main Cavern 4. Barracks 5. Prison Cell 6. Eastern Cavern 7. Anti-Illithid Defense 8. Officer Quarters 9. Trophy Room 10. Golem Laboratory 11. Stardock Gate Stardock 12. Dragons' Domain 13. Jerath’s Quarters 14. Infernexus’s Quarters 15. Githyanki Trainees 16. Nursery 17. War Wizards 18. Library 19. Warehouse 20. Dock 21. Warrior Quarters 22. Al’chaia’s Quarters 23. Observation Room 24. Knights' Quarters 25. Memorial Hall 26. Kitchen 27. Mess Hall 28. Armory 29. Prison 30. Warrior Training 31. Observation Room 32. Graduation Chamber Aftermath
Level 17: Seadeeps What Dwells Here? Mind Flayers Githyanki Exploring This Level 1. Tunnel Plexus 2. Dripping Cave 3. Halaster’s Maw 4. Flumph Cloister 5. Githyanki Grave 6. Battleground 7. Githyanki Stronghold 8. Operation: Eat Them All 9. Guard Post 10. Detention Facility 11. Halaster Is Glowing 12. Dynamo 13. Back Door 14. Psipod Nexus I 15. Psipod Nexus II 16. Old Dwarven Halls 17. Crumbling Bridge 18. Gray Mold 19. Unguarded Area 20. River Branches Aftermath
Level 18: Vanrakdoom The Dark Fate of Lord Vanrak Moonstar What Dwells Here? Keresta Delvingstone Umbraxakar Cult of Shar Into the Shadowfell Shadowfell Despair Exploring This Level 1. Entrance 2. Dusty Emptiness 3. Statue of Shar 4. Old Friends 5. Umbraxakar’s Gift 6. Cultists' Quarters 7. Halls of Worship 8. Scintilmorn’s Rest 9. Shadow Vigil 10. Ritual Chamber 11. Tunnels and Caverns 12. Candlelit Halls 13. Vampire Dens 14. Temple Chandlery 15. Shattered Throne 16. Arch Gate to Level 15 17. Lost Dwarven Horn 18. Shadow’s Edge 19. Hall of Death 20. Any Moonstars in Here? 21. Clutter 22. Under Black Sheets 23. Decrepit Dining Hall 24. Decrepit Kitchen 25. Prisoner of Darkness 26. Vampire Boss 27. Altars of Loss 28. Forgotten Chambers 29. Foggy Hall 30. Path to the Tomb 31. Vampire’s Tomb 32. Umbraxakar’s Lair 33. Dragon’s Hoard Aftermath
Level 19: Caverns of Ooze What Dwells Here? Genies of Earth and Water Scavenger Crew Worshipers of Ghaunadaur Wandering Monsters Exploring This Level Elemental Ooze 1. The Resplendent Grotto of Ichthyglug the Voluminous 2. Space Orogs 3. Ooze There? 4. The Weeping Eye 5. In the Grip of Ghaunadaur 6. Cave with a View 7. Standing Gate to Level 21 8. Thanks for the Memories 9. High Ground 10. Culvert 11. The Glittering Caverns of Jarûk the Prismatic 12. Ghaunadaur Shrine 13. The Scavenger 14. Ooze Den 15. Standing Gate to Level 17 16. Tunnel to Level 20 Aftermath
Level 20: Runestone Caverns What Dwells Here? Ezzat the Lich Stonecloaks Wandering Monsters Runestone Caverns 1. Desiccating Symbol 2. Mad Golem’s Lair 3. Sunken Paradise 4. Myconid Colony 5. Giggling Chasm 6. Lair of the Mummy Lord 7. Crypt Raiders 8. Made of Stone 9. Way to the Gate 10. Mad Mage’s Puzzle 11. Weird Magic 12. Old Behir Lair 13. Runestone Caverns 14. The Runestone Stalagmite Tower Capturing Ipses 15. Outer Door and Foyer 16. Animated Staff 17. Lich’s Study 18. Gnomes' Landing 19. Ezzat’s Scrying Mirror 20. Laboratory 21. Lit Landing 22. Rooms of Magic 23. Ezzat’s Phylactery Aftermath
Level 21: Terminus Level What Dwells Here? Fazrian the Planetar Yugoloths Duergar Calassabrak Wandering Monsters Exploring This Level 1. Entrance 2. Ore-Filled Cart 3. Depleted Mine 4. Deeper Mines 5. Rubble-Strewn Cavern 6. Duergar Outpost 7. Cleric’s End 8. Mining Equipment 9. Miners' Quarters 10. Common Areas 11. Kitchen and Pantry 12. Miners' Potty 13. Grand Vestibule 14. Shrine of Laduguer 15. Valtagar’s Quarters 16. Fire and Iron 17. Hammers and Anvils 18. Iron Mine 19. Outpost 20. Poisonous Mine 21. Clean Air Station 22. Guard Post 23. Fazrian’s Court 24. Secret Vault Aftermath
Level 22: Shadowdusk Hold What Dwells Here? The Shadowdusks Exploring This Level Tier 1 1. Grand Foyer 2. Twisted Gallery 3. West Wing 4. Decayed Quarters 5. Storeroom 6. Kitchen 7. Derelict Shrine 8. Nothic’s Niche 9. East Wing 10. Noble Quarters 11. Melissara’s Study 12. Lounge 13. Walking Dead 14. Training Room 15. Fountain Tier 2 16. Arcane Sanctum 17. Vertrand’s Room 18. Berlain’s Suite 19. Shadowdusk Hold Fresco 20. Pillared Hall 21. Parlor 22. Torm’s Shrine 23. Meditation Rooms 24. Nothic Warrens 25. Abandoned Chamber 26. Hoarded Secrets 27. Privy 28. Legacy of Xerrion 29. Landing Tier 3 30. Lower Halls 31. Approach to Madness 32. Far and Gone 33. Shrine 34. Zalthar’s Chambers 35. Eyes of Stone 36. Vacant Rooms 37. Secret Room 38. Dezmyr’s Chambers 39. Dracolich’s Phylactery 40. Lynnorax’s Lair 41. Shadowdusk Vault Aftermath
Level 23: Mad Wizard's Lair Who Dwells Here? Halaster Blackcloak Arcturia Trobriand the Metal Mage The Dungeon 1. No Retreat 2. Reversed Library 3. Talking Heads 4. Helmed Horrors 5. Magical Repository 6. Wizardly Wards 7. Teleportation Pillars 8. Teleportation Pillars 9. Vaults 10. Arcane Display 11. Trobriand’s Workshop 12. Gate to the Stone Bridge 13. The Metal Mage 14. Man with the Rabbit’s Head 15. Gate to Neverlight Grove 16. Broom Room 17. Arcturia’s Court 18. Animated Hallway 19. Double Door Roulette 20. Hidden Helm 21. Displaced Vault Halaster’s Tower 22. Tower Entrance 23. Gnome with No Name 24. Potion Brewery 25. Factory 26. Gate to Icewind Dale 27. Rantantar’s Wand 28. Hidden Treasure 29. Apprentice Portraits 30. Scrying Room 31. Art Studio 32. Jhesiyra’s Warning 33. Mad Mage Showdown 34. Flying Saucer 35. Exercise Room 36. Gate to Triboar Conclusion
Skullport Reaching Skullport Through Undermountain Through the Sea Caves Skullport Overview What Dwells Here? Exploring Skull Island Skull Island Weaponry 1. Murkspan Bridge 2. Main Gate 3. Harbors 4. Duergar Barracks 5. Human Barracks 6. Depleted Armory 7. Bugbear Barracks 8. Gargoyle Towers 9. Tower of the Seven Woes 10. Kuo-toa Lair Exploring the Town 11. Old Markets 12. Dead Man’s Corner 13. Thimblewine’s Pawnshop 14. Heralds' Meet 15. The Black Tankard 16. Gyudd’s Distillery 17. Skull Square 18. The Sea Chest 19. The Flagon and the Dragon 20. Dark Harvest Market 21. The Sword and Sextant 22. The Guts & Garters 23. The Feathered Rat 24. Thaglar’s Foundry 25. The Bat’s Roost 26. The Keel Hall 27. The Poisoned Quill 28. Twinbeard’s Traps 29. Sargauth’s Bounty 30. The Lanternlighter’s 31. Dalagor’s Fortress 32. Dumathoin’s Jest 33. The Overflowing Urn 34. Nightshade’s Caress 35. The Worm’s Gullet 36. Tanor’thal Refuge
Appendix A: Dungeon Denizens Halaster Blackcloak Halaster’s Lair Archdruid Champion Githyanki Gish Lava Child Living Spell Muiral Neothelid Scaladar Shadow Assassin Ulitharid Werebat