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Where to find the Cell Key in Phantom Blade Zero

How to open the locked cell at the Outpost entrance, early in Weeping Creek Valley

The player in Phantom Blade Zero uses the Cell Key to open the door of the cell outside the Outpost, and stands before a glowing purple pickup on the ground.
Image credit: Rock Paper Shotgun/S-Game
Ollie Toms avatar
Guide by Ollie Toms Senior Guides Editor
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The Cell Key is a unique item in Phantom Blade Zero which, as you may have guessed, unlocks a frustratingly locked door early on in the first map. A short distance into Weeping Creek Valley, just beyond the Outpost Courtyard Bell (the seventh Bell on the map), you'll find the locked door in question, built into a cave to the left of the Baishan Outpost entrance itself.

After clearing the entrance of enemies, you can inspect the cell door, but Soul won't be able to open it and reach the treasure inside without the Cell Key. Fortunately, the Cell Key isn't far away, and in this guide I'll show you the exact path to take in order to reach it and open up that pesky locked door as soon as possible.

Where to find the Cell Key in Phantom Blade Zero

An annotated map showing a section of the Weeping Creek Valley map in Phantom Blade Zero. A yellow line shows the path to find the Cell Key, and also notes the locations along the way of the Outpost Courtyard Bell, the Locked Door, and the Outpost Bell.
I've put together a map of the area, showing the exact path you need to take to find the Cell Key in the Baishan Outpost. | Image credit: Rock Paper Shotgun
The player in Phantom Blade Zero looks toward the entrance to the Baishan Outpost.
The player in Phantom Blade Zero finds that they cannot open the cell door outside the Outpost without the use of the Cell Key item.
Image credit: Rock Paper Shotgun/S-Game

The Cell Key can be found at the far end of the Outpost, behind a hut just beyond the Outpost Bell. To enter the Outpost, speak with the two guards to the right of the Outpost entrance and they will allow you inside.

The player in Phantom Blade Zero approaches and speaks with two guards to the right of the Outpost entrance.
The player in Phantom Blade Zero meets Forge, the Blacksmith working at the Baishan Outpost.
Image credit: Rock Paper Shotgun/S-Game

Head through the Outpost until you reach the Outpost Bell, in the same area as Forge the Blacksmith. Head through the doorway up the stairs beyond the Bell, and then turn right just before you reach the two men praying at a glowing red shrine.

The player in Phantom Blade Zero heads up some steps in the Outpost and turns right at a glowing-red shrine, on their way to find the Cell Key.
Image credit: Rock Paper Shotgun/S-Game

Avoid the Boss!

If you continue past the shrine instead of turning right, then you'll encounter a major story boss - Peng Meng, the Axemaster. So make sure you turn right before the shrine!

The player in Phantom Blade Zero heads along the front side of a hut and around its right-hand side, on their way to find the Cell Key.
Image credit: Rock Paper Shotgun/S-Game

Follow this path up the steps and you'll reach a hut. Follow the wooden walkway around the right-hand side of the hut, and you'll reach a clearing behind the hut. Loot the gold pickup in the middle of this clearing to obtain the Cell Key.

The player in Phantom Blade Zero picks up the Cell Key item from the ground behind a hut in the Baishan Outpost.
Image credit: Rock Paper Shotgun/S-Game
Exploring the rest of the hut An extra tip from Ollie

It's worth fully exploring the hut before you return. To the left of the entrance you can break through some crates and loot 2x Exotic Copper Ingots behind them. Inside the hut you'll find 2x Forged Metal on the floor. And to the left of the Cell Key pickup, there's another small room containing 381x Remnant Dust.

Once you've got the Cell Key, head back the way you came until you reach the locked prison cell just before the entrance to the Outpost. With the Cell Key in your possession, you can interact with the door to open it.

What is the reward inside the Cell?

Behind the cell door is a single reward: a Blackstone Fragment, found on the ground of the cell. Blackstone Fragments are among the most important collectible resources in Phantom Blade Zero: every four Fragments you find will automatically fuse into a whole Blackstone, permanently increasing your Attack Power and Guard Break by +10%, and unlocking new skills in Soul's skill tree.

The player in Phantom Blade Zero uses the Cell Key to open the door of the cell outside the Outpost, and stands before a glowing purple pickup on the ground.
The player in Phantom Blade Zero collects a Blackstone Fragment from the ground of the cell outside the Outpost.
Image credit: Rock Paper Shotgun/S-Game

There's nothing else behind the Cell Key door, so you can now feel free to return to the Outpost Bell and continue your journey from there - most likely, towards the Axemaster boss awaiting you beyond that glowing red shrine!

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