This guide shows where to find the rust key and how to use it in Elden Ring.
Rusty Key Location
Rusty Key can be found in the Stormveil Castle in the Limgrave area. I will show the path from the Stormveil Cliffside Site of Grace. Click here to see how to reach the Stormveil Cliffside Site of Grace.
From the Stormveil Cliffside Site of Grace, Climb up the stairs ahead and enter the building as shown in the picture below.
Inside the building, keep climbing up the stairs till you reach the top level. On the top level, you will find a door as shown below. Inside this door, you will find a Rusty key on a corpse. Beware of a knight inside this room.
How to use the Rusty Key
Take the Rusty Key. Come out of the room, then turn right and jump down. Use the rusty key to open a door on the north side as shown in the second picture below. The door is one level below the top level, where you found the key.
