Return to the platform via the locked doors, but don't make use of the key yet. Instead, look for a huge hole in the wall to the left to the right of Elden Ring Runes the doors. In the hole within the wall, where you will discover St. Trina's Arrow x10. Make sure to target the enemy below and kill them with an attack falling. Beware of an enemy with a spear on your left who will attack you with firebombs and a third one who will climb onto the ladder near an upper level of your staircase. When all enemies are removed, climb up the ladder and reenter the room through the hole in that wall at the top.
Return to the door that was locked from earlier and unlock it with the Rusty Key, then climb the ladder inside to reach the platform above. Once you have left the door, take a left towards the platform in front of you, taking care to jump across the gap , not drop down. The remaining enemy must be killed at the center of the platform, and then move across the plank of wood to locate a new enemy and Fire Grease.
The wooden platform, which is located to the right from the wooden plank. Run and jump to it in order to get access that leads to the outside. In this area, you'll encounter the shielded soldier. Stay on your feet and try not to get knocked down the steps. Proceed down the steps and enter the door on your left. You will meet another soldier, as well as that's the Brick Hammer. Don't drop down from this point. Instead, you should turn around and walk all back to Elden Ring Items for sale the room with the ladder.