ASHEN - Rook Shield Location
Checking to see if Spee.ch has your asset locally...
The Rook Shield is found near the Listener's Ridge Ritual Stone. You can only access the area after defeating Garoran, the boss of the Stormed Ruins area.
This video is a part of the ASHEN - Weapon, Armor, Shield & Feather Locations playlist: https://www.youtube.com/playlist?list=PLsxfoGQwyeP42HmRSxCgVw5PASYMMbJxQ