It's at this point you can start fighting Valkyries, as several of them are found behind these doors. Once you face you first, you'll unlock the side-quest Prove Your Valour, telling you to hunt down the rest.
It's at this point you can start fighting Valkyries, as several of them are found behind these doors. Once you face you first, you'll unlock the side-quest Prove Your Valour, telling you to hunt down the rest.