Last Updated on Oct 20, 2025 @ 14:31:46 PM.
Whilst you’re exploring the huge Druid Castle in Casterfell Woods, you’re going to want to find and use the Castle Fireplace Key to save yourself A LOT of time in Atomfall. The exact location is explained below in our guide.
Where to Find the Castle Fireplace Key in Atomfall
During your journey through Atomfall, you will eventually come across the Druid castle within the area of Casterfell Woods and will be tasked with fighting your way through this large area. Although there are a few different ways to make your way through this large castle, one way will shorten your journey by a large portion and avoid a large amount of combat.

One of the best features of Atomfall is the ability to use different pathways to tackle a daunting objective, with one of these pathways being a fireplace that holds a secret door leading to the heart of the druid’s castle.
If you decide to walk through the front door of the castle rather than looking for an alternate route, you will eventually come across a large dining hall. At the end of this dining hall is a throne that holds a fireplace behind it with a keyhole placed directly next to it.
This will cause you to ask yourself, where is the key to this fireplace? Well, do not worry, as we have the directions written below for you to follow.
- As you are looking at the fireplace, turn to your left, and there will be an archway-shaped passageway.
- Once you have passed through the passageway, follow the path through another archway, and then turn immediately to your right, and there will be a small door.
- This door will lead you into the kitchen of the druid’s castle. Once you enter the kitchen, follow the pathway around, and you will then see a long wall with a kitchen counter on the left-hand side.
- On this counter there will be a small lit candle; just next to this candle is where the key resides.
Now that you have obtained this key, you will finally be able to access the fireplace’s secret passageway that will lead you into the heart of the castle, providing a shortcut for many of the leads that hide in the depths of this cursed place.
For more Thumb Wars Gaming coverage, check out our review of Atomfall, or our guide showing you how to find the Signal Redirector in Atomfall.
Liam is a Senior Editor, Writer, and Critic for Thumb Wars and has been working with the team since day one. Liam is a big fan of all things gaming, as you will catch him playing all of the new releases from every genre you can imagine. Whether you find Liam gaming just for fun or spending his free time streaming, you will always find a smile on his face when it comes to all things gaming.