Cinders of Faith

 is a side quest in.

Synopsis
Fyrga, the Tranquil Ardent of Magran in Defiance Bay, is having a crisis of faith, during which she has had several visions of a cave at a place with multicolored pools and a rising waterfall. She believes that something there can restore her faith, but also believes there is a danger there that would try to kill her. If the Watcher were to find this something and bring it back, she might be able to resume her duties and rekindle the city's sacred fires.

Walkthrough

 * 1) Speak with Fyrga in the Ducal Palace to begin this quest.
 * 2) (Optional) The name of the location from Fyrga's vision is not yet known, but the journal hints to the expedition hall in Copperlane. Ask Wenan, and he wants to sell you a map, with the exact place marked for . He also tells you that the map is locked away in a chest in the Den, which you can pilfer to avoid paying (requires Mechanics 4). Note that Wenan can only be asked if you have not already stolen the map, or if you have not yet discovered the Searing Falls by exiting the Woodend Plains to the south.
 * 3) Once arrived at the Searing Falls, head to the northwest section of the map to find the Searing Falls Cave. You will have to fight through a few groups of drakes and xaurips to get there.
 * 4) Inside the cave, fight your way through more xaurips and Flame Blights until you come across Cail the Silent. Kill him, and you will find a burning stone, a fragment of the Godhammer. Hidden among the gold coins you can also find the unique great sword Tidefall. Must have Mechanics level 10 to find Tidefall.
 * 5) Return the fragment to Fyrga, and answer her question to determine the quest's outcome. She will give you the unique flail Unforgiven as thanks.