Elden Ring PC | Location of Ash of War: Storm Stomp & Whetstone Knife from Gatefront site of grace

Ash of War: Storm Stomp
"Ash of War: Storm Stomp is an Ash of War and Upgrade Material in Elden Ring. Ash of War: Storm Stomp provides the Quality affinity and the Storm Stomp Skill. Ashes of War can be used to modify the Skill of an equipment piece, or to apply affinities that modify scaling values."
https://eldenring.wiki.fextralife.com/Ash+of+War:+Storm+Stomp

Whetstone Knife
"Whetstone Knife is a Whetblade in Elden Ring. The Whetstone Knife can add new battle arts and affinities to weapons. Key Items in Elden Ring include a wide variety of items found in specific locations or are given by related NPCs, which are used to unlock areas, quests, and to further progress the game's story."
https://eldenring.wiki.fextralife.com/Whetstone+Knife