Dross of Pure Sacred Dewdrop

To obtain Dross of Pure Sacred Dewdrop, you'll need to challenge the Echoes of the Deep Tides Domain located in the Court of Fontaine region.

You will be rewarded with Dross of Pure Sacred Dewdrop by successfully challenging the Domain of Forgery: Artisanship at any level. It's only open on Tuesdays, Fridays, and Sundays. The recommended party level for the Domain of Forgery: Artisanship 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.

Legends say that before the birth of life, there was a dense primordial sea. It is the purest origin of all things, and one day, it will also swallow all life... and those things which did not arise from it will be filtered out, becoming naught but floating detritus. "The existence of detritus also has meaning — What kind of thing would be rejected by the source of all things that swallows all life?" the [sic] young Harmost asked the great usurper, pondering this conundrum.