The Horizon Forbidden West Burning Shores Murmuring Hollow code is probably one of the more complex little puzzles you'll find in the new DLC. It involves your flying mount, some trains, energy cells, and more. So here's how to find the A Friend in the Dark Door code at the Murmuring Hollow ruin in Burning Shores - not just one but all three of them.
1. Get into the train area
Firstly, while you're staring at the door that you need the key module for, turn right around and you'll notice some rusting train cars behind you. A lot of what we need for this Murmuring Hollow code is behind those trains. So, head back up to the ground level and look to your right towards the campfire. Just to the right of the camp is a yellow piece of metal that you can use to rappel down to the level below. This will get you into the train car area.
