Go back around the tower. Instead of going back to the roof on which you were fighting the stormhawk, would like to jump onto the roof that is adjacent to it, with Elden Ring Runes the pillar that is crumbling on it. You'll need to climb the pillar in order to reach the ledge that is above you, after which you'll be able to find another accessible rooftop.
This roof is filled with soldiers, therefore be cautious when you walk up to it. I would recommend starting by killing the soldier sleeping on the right. After that, you can consider hiding behind the tower to be safe from the three crossbow soldiers on your left. You should let them approach you to be eliminated one by one. Once they're dead, take a climb to the tower and go to the Claw Talisman.
Take the ladder back down after which you can retrace your steps all the way to that roof with the crumbling pillar. You'll find a gap between the roof and the one where you battled the stormhawk. You can heal to full HP and then go to the lower courtyard where there is an Stonesword Key door and a Somber Smithing Stone [2]. Utilize it with the Stonesword Key you recently got to unlock the door, Be aware of two axe soldiers waiting inside. Drag them out of the courtyard one at elden ring weapons for sale a time if you need a little space to run around. Slam attacks from them are quick, so you'll be able to easily get bnehind them and execute a back stab. Inside the room , you'll find the Hawk Crest Wooden Shield, Misericorde and the Iron Whetblade.
