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Genshin Impact
Underwater Nocturne Quest Guide
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Underwater Nocturne is the second quest under the Canticles of Harmony Quest quest chain in the Faded Castle for Genshin Impact 4.6. See how to unlock the World Quest, its walkthrough, and the complete rewards here in this guide!
| Canticles of Harmony Quest Guides | |||||
|---|---|---|---|---|---|
| The Shadow Over Petrichor | Underwater Nocturne | The Last Day of Remuria | |||
| Gradus ad Capitolium | Fortune Plango Vulnera | ||||
List of Contents
How to Unlock Underwater Nocturne
Complete The Shadow Over Petrichor Quest
To unlock Underwater Nocturne, you must have completed the previous subquest of Canticles of Harmony Quest, The Shadow Over Petrichor!
The Shadow Over Petrichor Quest
Underwater Nocturne Walkthrough
Continue exploring the Faded Castle
Continue exploring the Faded Castle by going upstairs, and following Osse. Upstairs, you can either go to the room where a Teleport Waypoint lies, or go right and follow Osse to the stage to trigger a cutscene.
Note the going to the stage will eventually lead you to the room to the left where a Teleport Waypoint is located.
Take the Blank Score
Talk to Osse on the stage and play through the cutscene. Osse will ask you to Take the Blank Score by solving the Autoharmonic Reed Pipes puzzle. You can find it on the room where you can find a Teleport Waypoint.
How to Take the Blank Score
| Puzzle Solution | |
|---|---|
| 1 |  Go to the right Autoharmonic Reed Pipe and play a tune to adjust it. Move it one level only to match the indicated note near its back. |
| 2 |  Head to the left Autoharmonic Reed Pipe and do the same thing as the first one. Move the arrow to the middle part to match the note near it. |
| 3 |  The pedestal containing the Blank Score will be unlocked, along with an Exquisite Chest, after solving the Autoharmonic Reed Pipe puzzle. Grab the Blank Score and return to the stage to progress. |
Play the Symphony
on the Mural
Go back to the stage and put the Blank Score onto the pedestal to play the Symphony on the mural. It will trigger a cutscene where Boethius will come out from the mural.
It will also activate the stage and you will be able to interact with it later to get a Luxurious Chest, and retrieve the Tuba Mirum score!
Osse Becomes Monsieur Os
After talking to Boethius in the cutscene, Osse will become Monsieur Os, with a title "Cassiodor" underneath. You should be able to pet Osse without him getting mad now after this part!
Defeat the Golems
After the cutscene with Boethisus, he will wake up four Golems to attack you. You can easily beat them if you have a Geo Character, like Zhongli or Arataki Itto, as they can tear through their shield quickly.
The quest will end after defeating the statues and after a cutscene. You can also head back to the Harp, and begin the performance on the mural to get the Tuba Mirum Score!
Tuba Mirum Location and How to Use
Underwater Nocturne Information
Sub-Quest of Canticles of Harmony Quest
Underwater Nocturne is a subquest of the Canticles of Harmony quest, where you try to help the people in Remuria and uncover the strange things happening to them.
Underwater Nocturne is the Second part of the Canticles of Harmony Quest world quest chain.
Canticles of Harmony World Quest Guide
Underwater Nocturne Rewards
Total Quest Rewards
| Total Quest Rewards |
 Primogem x20 |
 Mora x32500 |
 Hero's Wit x2 |
|---|---|---|
Genshin Impact Related Guides
Other Canticles of Harmony Quest Guides
| Canticles of Harmony World Quest Guides | ||
|---|---|---|
| The Shadow Over Petrichor | Underwater Nocturne | The Last Day of Remuria |
| Gradus ad Capitolium | Fortune Plango Vulnera | |
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Underwater Nocturne Quest Guide
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