Item from Divergent by Veronica Roth
The serum that powers Dauntless fear landscapes and — in Jeanine's hands — the mass mind-control attack that turned an entire faction into sleepwalking soldiers.
The simulation serum has two modes. In training, it creates personalized fear landscapes — simulated environments built from the subject's deepest fears, used to teach Dauntless initiates to manage panic. It's therapeutic, almost. You face your fears in a controlled space. You learn. Jeanine weaponized it. Her modified version doesn't create personal simulations — it overrides consciousness entirely, turning the injected person into a compliant puppet receiving commands from a central transmitter. The subject walks, aims, fires, and has no awareness of what they're doing. They wake up, if they wake up, with blood on their hands and no memory of pulling the trigger. Divergent individuals are immune. The serum can't override their neural pathways. This is why Jeanine hunts them — not because they're dangerous to the public, but because they're dangerous to her control.
A pale blue-tinged liquid injected at the base of the skull. The injection site burns. Within seconds, the subject's eyes glaze and they enter a simulated reality indistinguishable from the real world. During the Abnegation attack, thousands of injected Dauntless members walked in formation with blank eyes and loaded guns.
Also known as: Simulation Serum, Fear Serum, Attack Simulation, Mind Control Serum