Verified answer
Quick answer
A Bulwark Against Darkness asks for a Relic of a Saint, Bundle of Silk Threads, Flask of Quicksilver, and Moult of a Large Lizard. Delivering each component to the Uriashi blacksmith produces one piece of the Arbiter set.
After all four pieces are forged, complete the final ritual and boss encounter to upgrade the set to legendary rarity. Reforge St. Mihai’s sword first and advance the main route if the courier has not appeared.
Evidence checked September 20, 2026. Component locations are verified; reports differ on whether the opening courier requires the reforged sword, Infamy progress, or both.
Prepare the armor route with the Forge It Anew, Map & Collectibles, Skills & Builds and Best Quest Order.
How to start A Bulwark Against Darkness
The legendary Arbiter set is tied to A Bulwark Against Darkness. Current walkthrough evidence indicates that the courier and component list appear after you reforge St. Mihai's silver sword; the route is therefore best treated as a follow-up to Forge It Anew. Some guides also report an Infamy requirement, so advance the main route if the courier has not appeared.
All four Arbiter armor components
| Component | Reliable route | Important detail | | ----------------------- | --------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------- | | Relic of a Saint | Take the Saint's Tibia from the corpse below the west-side ladder in St. Tyna's Convent during Echoes of Silenced Bells | This avoids sacrificing a higher-value equipped relic | | Bundle of Silk Threads | Unlock the Sanzhana merchant through the Sanzhani quests, then buy the threads | Come Hither may provide a free route if completed before purchase | | Flask of Quicksilver | Return to Aurelius' study at the top of his tower in southwest The Silts after the tower quest | The flask is on a table to the left inside the study | | Moult of a Large Lizard | Cave east of Muddy Trail shrine in the Briar Sloughs bog, almost directly south of Vera | Defeat the Tatzelwurms, then collect the moult at the back |
The Sanzhana trader route passes through Gone Home, Letters to Lunka, and later Sanzhani tasks. The silk is expensive if purchased, so finish their available quests before spending denari.
How to forge the legendary set
Bring each component to the Uriashi Hermit blacksmith in northwest Briar Sloughs. Each hand-in produces one piece of Arbiter armor. After all four pieces are made, complete the final ritual and its wolf and ravenous-bear encounter to upgrade the set to legendary rarity.
This is the site's strongest verified recommendation for a complete named armor set because the entire route and final upgrade are documented. It is not a claim that every build must use Arbiter gear.
Source check
The component locations and final ritual were cross-checked against PC Gamer's A Bulwark Against Darkness walkthrough. The start caveat is kept explicit because guide coverage differs on whether the sword, Infamy, or both are required before the courier appears.