Sekiro: Shadows Die Twice Wiki
Highly precious grains forming the base for a devastating form of gunpowder.

Used in explosive Prosthetic Tool upgrades of advanced rank.
Created in secret by the Interior Ministry using knowledge from across southern seas. The central forces' military might owes much to this tiny tweak of chemistry.

Fulminated Mercury.png

Fulminated Mercury (雷汞, Raikō) is an upgrade material.

It is used for Prosthetic Tool upgrades:

Ashina Outskirts
  • (After Invasion) Just past Shigekichi, before the stairs.
  • (After Invasion) Near the Chained Ogre.
Ashina Castle
  • (Second Invasion) Below the Ashina Reservoir Sculptor's Idol.

Hirata Estate