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 Ash of War can be duplicated, but currently cannot be applied to any other weapon (needs more research).