Storm Wall is a Skill in Elden Ring. Storm Wall is a regular skill that can be found in Ashes of War and can be applied to small and medium shields. This skill deflects incoming physical projectiles such as arrows but can also be used as a regular parry skill. 

Elden Ring Storm Wall Guide, Notes & Tips

• This is an Ash of War Skill, associated with the Ash of War: Storm Wall.
• FP Cost: 3
• Storm Wall has 5 start-up frames and 5 parry frames at 30 FPS. Double the values for data at 60 FPS.
• Storm Wall can knock projectiles out of the air.
• See Parrying for detailed information on the mechanic and a comparison of different parry skills.