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Rainbow in the Dark

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The Den of Obscurity is a dark, treacherous series of caverns largely untouched by man for thousands of years.

The Vale of Twilight adpack icon.jpg
DDO Point icon.png Requires access to adventure packIcon tooltip.png: The Vale of Twilight
Rainbow in the Dark
Heroic level: 16
Epic level: None
Duration: Very Long
Heroic XP:  ♣4,860Icon tooltip.pngSolo/Casual ♦8,433Icon tooltip.pngNormal ♥8,766Icon tooltip.pngHard ♠9,099Icon tooltip.pngElite
Epic XP: N/A
Takes place in: Den of Obscurity
Bestowed by: Walk-up
NPC contact: Walther Daedal
Quest acquired in: The Vale of Twilight
Patron: The Twelve
Base favor: 8
Free to Play: No
Extreme Challenge: No
M rainbow in the dark.png
Loading screen


While exploring the Vale of Twilight, you happened on the Den of Obscurity. The underground lair will prove difficult to traverse due to its lack of light.

  • This is a walk-up quest, automatically bestowed by reaching the Den of Obscurity. The reward NPC (Walther Daedal) is located in Meridia - go up the ramp on the north side of the temple to the tavern area; Walther is in the northeast corner.

Spoiler Warning: Information below this point can be considered spoiler material!


  • Pick up the illuminated sceptre
  • Explore the Den of Obscurity
  • Place scorpion crest in socket
  • Solve the secret of the Rainbow
  • Search the chamber for treasure
  • Defeat the ancient guardian
  • (Optional) Slay Memnezerez — Bonus (20%): Heroic( ♣972 ♦1,687 ♥1,753 ♠1,820 )

What to Expect

  • A near pitch-black dungeon environment! There is almost no light for the majority of the twisting and treacherous path, so party must rely on (and stay close to!) one player with a "torch", the Radiant Arc, provided at the start of the quest (see Tips below).
  • Traps (random, some undisarmable)
  • Collapsible floors
  • Spawning/respawning monsters
  • Puzzles (mandatory: rainbow puzzle and optional: clock-like puzzle)

Known Traps

Trap DCs

  • Pike Traps (Like ones in the Reaver's Fate)
  • Button in intersections summon fire elementals
  • Trapped portal randomly before the shrine, can be disabled, otherwise you need to kill the elementals to be teleported back.
  • Three traps on the way to the optional chest.

Tips and Misc

  • Useful buffs
    • Acid resist
    • Electricity resist (for casters and gnoll arrows)
    • Fire resist (for the end boss).
  • Useful gear: Everbright (Rust Monsters), Summoned Repair Shop.
  • The one and only source of light for much of the quest is provided at the start:
  • Lantern Archons and similar summons no longer work as alternative light sources. Alternate graphics effects caused by Shadow Walk still work.
  • Rainbow puzzle: Simply jump on each button until it's lit in the color desired. With the door in front of you, starting on the left end: set the colors to Red, Orange, Yellow, Green, Blue, Indigo, Violet. (For players who are colorblind or have monitors with poor color resolution, an on-screen caption will display the color you've just set.) Some people get fancy by un-lighting all the buttons, then running down the row repeatedly, skipping one more button on each run, but this isn't necessary.
  • Clock puzzle: The lever that makes the floor fall is random. Russian roulette, one mistake and you're falling onto lots of pointy things.
  • A chest found in a hidden, long room requires a strong Search and Disable Device DC to find and disable control boxes traps that cause the floor to fall, making chest access impossible. Keep the rest of the party out of that room as your trapper does their work.

Basic walkthrough

  • Have someone with a free hand* grab the Radiant Arc and wield it. Go straight ahead slowly and kill stuff - the mobs you get depend on the instance but tend to be in small groups. Jump down the hole when you get to it, turn around and basically follow the path east back the way you've come - except you're on the lower level now. The path will curve to the south.
(* Probably a caster, 1-hand fighter, or just your lowest DPS character.)
  • When you get to the intersection, go left (east). Watch out for the button on the floor if there is one in your instance. A short way down the corridor, there is a three-way intersection. Turn right if you want to try for the "clock puzzle" chests, or fight your way down the rest of the corridor and get the Crest of the Scorpion. Fight your back to the first intersection or cast Dimension Door and kill off the stuff that has respawned.
  • When you get to the intersection again, go west. Fight your way down the corridor, put the crest in the door and eventually you'll get to a shrine. When you approach the shrine, you'll be teleported to a small room where you will need to kill four Fire Elementals. Once you've dispatched them, you'll be teleported back to the shrine.
  • Continuing south past the shrine are a bunch of windlasher gnolls. Take them out and turn right (west). Keep going until you get to the silver key. There is a boarded up passage here - smash down the boards if you want to go for the optional beholder chest.
  • Go back to the gnoll intersection. Turn right (south) and cross the pit.
  • At the next intersection, either:
    • Go right (west) if you have a rogue who can disable the traps. If you can't disable the traps, you will not be able to access the chest.
    • Go left (east) towards the end of the quest. Complete the puzzle, park the Radiant Arc, buff yourselves senseless, defeat end boss Turun-Palo (red-named Fire Elemental, CR29 on elite) and loot the chest.

Bonus XP

  • Aggression bonus: ~187 or more monsters killed +10% Bonus.( ♣486 ♦843 ♥877 ♠910 )
  • Tamper bonus: 3 or more traps disarmed +10% Bonus.( ♣486 ♦843 ♥877 ♠910 )
  • Neutralization bonus: 4 or more traps disarmed +20% Bonus.( ♣972 ♦1,687 ♥1,753 ♠1,820 )
  • Ingenious Debilitation bonus: 5 (Hard/Elite: 7) or more traps disarmed +30% Bonus.( ♣1,458 ♦2,530 ♥2,630 ♠2,730 )
  • Perception bonus: 2 or more secret doors discovered +10% Bonus.( ♣486 ♦843 ♥877 ♠910 )


  • NPC rewards: Random item (up to 15th level accessories, up to 14th level weapons and armor)


Name(picture) CR Type Race
 ♦18Icon tooltip.pngNormal ♥22Icon tooltip.pngHard ♠28Icon tooltip.pngElite Evil Outsider Devil
Ancient Fire Elemental(view)
Ancient Fire Elemental.png
CRs missing! Elemental Fire Elemental
Ancient Stone Golem(NoPic)
No pic.jpg
 ♠23Icon tooltip.pngElite Construct Golem
Bearded Devil(view)
Bearded Devil.jpg
 ♦15Icon tooltip.pngNormal ♠20Icon tooltip.pngElite Evil Outsider Devil
Dense Stone Earth Elemental(view)
MonsterArt EarthElemental official.jpg
 ♠23Icon tooltip.pngElite Elemental Earth Elemental
Elder Beholder(view)
Elder Beholder.jpg
 ♦17Icon tooltip.pngNormal ♥19Icon tooltip.pngHard ♠22Icon tooltip.pngElite Aberration Beholder
Ferocious Rust Monster(view)
Ferocious Rust Monster.png
 ♠21Icon tooltip.pngElite Aberration Rust Monster
Fiend Blood Troglodyte(NoPic)
No pic.jpg
Depending on Area Reptilian Troglodyte
Fiend-Blood Scorpion(view)
Fiend-Blood Scorpion.jpg
 ♦12Icon tooltip.pngNormal ♠17Icon tooltip.pngElite Magical Beast Scorpion
Fiend-Blood Troglodyte Ranger(view)
Fiend-Blood Troglodyte Ranger.jpg
 ♦15Icon tooltip.pngNormal ♠22Icon tooltip.pngElite ♥22Icon tooltip.pngEpic Hard ♠34Icon tooltip.pngEpic Elite Reptilian Troglodyte
Fiend-Blood Troglodyte Stalker(view)
Fiend-Blood Troglodyte Stalker.jpg
 ♦15Icon tooltip.pngNormal ♠22Icon tooltip.pngElite Reptilian Troglodyte
Fiend-Blood Troglodyte Theurge(view)
Fiend-Blood Troglodyte Theurge.jpg
 ♦16Icon tooltip.pngNormal ♠23Icon tooltip.pngElite Reptilian Troglodyte
Fiend-Blood Troglodyte Warmaster(view)
Fiend-Blood Troglodyte Warmaster.jpg
 ♦16Icon tooltip.pngNormal ♠23Icon tooltip.pngElite Reptilian Troglodyte
Fiend-Blood Troll(view)
Fiend-Blood Troll.jpg
 ♦16Icon tooltip.pngNormal ♠23Icon tooltip.pngElite Giant Troll
Fierce Rust Monster(view)
Fierce Rust Monster.png
 ♠18Icon tooltip.pngElite Aberration Rust Monster
Gelatinous Cube(view)
Gelatinous Cube.jpg
 ♦18Icon tooltip.pngNormal ♠6/23Icon tooltip.pngElite Ooze Gelatinous Cube
 ♦18Icon tooltip.pngNormal ♥22Icon tooltip.pngHard ♠26Icon tooltip.pngElite Aberration Beholder
 ♦15Icon tooltip.pngNormal ♥12Icon tooltip.pngHard ♠20/29Icon tooltip.pngElite Evil Outsider Devil
Spotted Twilight Hyena(view)
Spotted Twilight Hyena.jpg
15 Animal Hyena
Stone Scorpion(view)
Stone Scorpion.png
 ♦15Icon tooltip.pngNormal ♠20Icon tooltip.pngElite Construct Golem
Striped Twilight Hyena(view)
Striped Twilight Hyena.jpg
 ♠19Icon tooltip.pngElite Animal Hyena
Tormented Shadow(view)
Tormented Shadow.jpg
CRs missing! Undead Shadow
 ♦19Icon tooltip.pngNormal ♥23Icon tooltip.pngHard ♠29Icon tooltip.pngElite Elemental Fire Elemental
Twilight Bat(view)
Twilight Bat.png
 ♠17Icon tooltip.pngElite Animal Bat
Windlasher Austere(view)
Windlasher Austere.jpg
 ♦16Icon tooltip.pngNormal ♠23Icon tooltip.pngElite Gnoll Gnoll
Windlasher Conjurer(view)
Windlasher Conjurer.jpg
 ♦16Icon tooltip.pngNormal ♠23Icon tooltip.pngElite Gnoll Gnoll
Windlasher Evincer(view)
Windlasher Evincer.jpg
 ♦12Icon tooltip.pngNormal ♠17Icon tooltip.pngElite Gnoll Gnoll
Windlasher Harbinger(view)
Windlasher Harbinger.jpg
 ♦16Icon tooltip.pngNormal ♠23Icon tooltip.pngElite Gnoll Gnoll
Windlasher Recluse(view)
Windlasher Recluse.jpg
 ♦12Icon tooltip.pngNormal ♠17Icon tooltip.pngElite Gnoll Gnoll
Windlasher Savage(view)
Windlasher Savage.jpg
 ♦14Icon tooltip.pngNormal ♠19Icon tooltip.pngElite Gnoll Gnoll
Windlasher Typhoon(view)
Windlasher Typhoon.jpg
 ♦14Icon tooltip.pngNormal ♠23Icon tooltip.pngElite Gnoll Gnoll
Windlasher Veteran(view)
Windlasher Veteran.jpg
 ♦12Icon tooltip.pngNormal ♠17Icon tooltip.pngElite Gnoll Gnoll


  • Several of the Vale quest names are references to song names from ~80s hard rock/heavy metal bands: