Fragment of an Ancient Chord

To obtain Fragment of an Ancient Chord, you'll need to challenge the Echoes of the Deep Tides Domain located in the Court of Fontaine region.

You will be rewarded with Fragment of an Ancient Chord by successfully challenging the Domain of Forgery: Robotic Ruse at any level. It's only open on Mondays, Thursdays, and Sundays. The recommended party level for the Domain of Forgery: Robotic Ruse I is 15, but it's always best to challenge the highest level Domain for better rewards.

It's recommended to have Hydro, Pyro, Cryo, and Anemo characters in your party, but they are not required to complete the challenge. The Domain features the following Ley Line Disorder: After a character triggers Hydro-related Reactions, all party members will be granted a Hydro DMG Bonus. As such, place Hydro characters in the party to defeat your opponents more effectively.

After challenging the Domain, collect rewards using 20 Resin. You can also receive double the rewards by spending one Condensed Resin.

The Echoes of the Deep Tides is located in the Court of Fontaine. Refer to the image below for its exact location.

A harp with rotten keys. Its voice blocked, it cannot be played nor its sound heard. It is said the descendants of the forgotten music once lacquered mechanical wooden harps with gold in order to revive the magnificent remnants of the ancient dynasty, futilely attempting to match them to the silent golems...A long time passed, and then more, and the rotten, off-key harps remained in the grasp of those silent giants, caressed by the waves, playing only sorrowful strains.