This Ash of War grants an armament the Keen affinity and the following skill:

Ash of War: Blind Spot Location in Blind Spot: Comes equipped to the Backhand blade found besides a coffin, in the Inquisitor enemies area of Gravesite PlainRegion, not far from the first site of grace. Here is the location the Backhand blade in our interactive map FP Cost: 9. Deals 10 stance damage. This Skill is not Chargeable Upon activation, the user makes a quick dash to the side, before suddenly stabbing the enemy from the side. When locking onto an enemy, inputting the left or right movement key when using the weapon skill will move the user in said direction. The dash briefly grants an unknown amount of invulnerability frames. The stab attack deals piercing damage, and thus is affected by the Spear Talisman. The stab also completely bypasses blocking, similar to the Piercing Fang weapon skill.