The Ash of War confers Blood affinity upon an armament and introduces the skill "Seppuku."

This forbidden technique, used by swordsmen from the Land of Reeds, involves plunging the blade into your stomach to stain it with blood.

This increases attack power and improves the ability to inflict blood loss.

Usable on swords as well as polearms capable of thrusting, with small and colossal weapons excepted.

To obtain these Ashes of War, travel to the lake to the east of the snowy frozen lake.

Upon arriving, eliminate the invisible dung beetle according to the white mark on the lake to acquire the Battle Ashes.