The Ash of War, when applied to any melee armament, imparts the Heavy affinity and introduces the following technique:

"Resilient Posture: Adopt a steadfast stance to fortify against incoming attacks, temporarily enhancing poise. Damage incurred during the execution of this skill is mitigated."

These war ashes can be found within the shattered abode of the Nimgfu warriors.

To acquire this Ash, it can be obtained from Bernal through a purchase, requiring an expenditure of 600 runes.