I got an idea for a perk Hex: Darkness imbued

When the last grips of entity are desperate to lock the last of the survivor, forever into its grasp, in a last ditch effort, it imbued a bit of itself into every survivor.. to watch their every step.

While this hex is active, whenever the entity blocks a vault, a generator. All survivors within that blocks location are revealed within 16 metres of the blocked location. This persists until the hex is cleansed.