Multiple gaming guides outline how players can locate the “cell key” needed in Phantom Blade Zero. The key unlocks a locked door in the Outpost Courtyard, allowing access to a reward tied to that area.
Both sources frame the information as practical, step-by-step location help for a specific in-game objective. Polygon emphasizes where the cell key is found specifically for the Outpost Courtyard locked door, while PCGamesN frames it more generally as the way to obtain the Cell Key to explore an off-the-path area for progress.
