Niflheim native-microbe exposure trials

The Niflheim native-microbe exposure trials are the colony’s first systematic test of whether the planet’s microorganisms can harm human beings. Because Mickey Barnes serves as the expedition’s Expendable, the test is performed on him: Command exposes him to organisms collected from the local environment, observes the effects, and uses his deaths and recorded responses as research data. The trials establish the practical logic of the colony’s survival protocol while revealing its brutal price: a backup can restore Mickey’s body, but it cannot make the suffering of each iteration abstract or painless.

Purpose and procedure

The trials begin less than a day after the expedition reaches Niflheim’s surface. The first responsibility of a new colony is to determine whether local microbiota threaten human health; the procedure assumes that some organism will indeed pose a danger. The Expendable is exposed to anything that can be isolated from the environment, and Medical waits to see what happens. This arrangement makes Mickey’s expendable status operational rather than merely nominal: his body is the test site, and the colony’s need for biological knowledge takes priority over his immediate safety.

The risks had been explained before Mickey enlisted. On Midgard, recruiter Gwen Johansen described the possibility of lethal radiation, dangerous medical experiments, and exposure to local life. Mickey understood that the job could kill him, but expected that he might end a fatal ordeal himself and wake as a new iteration. Gwen warned that Expendables rarely kill themselves and that some experiments must continue until Command has collected the necessary data. The Niflheim protocol gives that warning concrete form: the research requires not only exposure, but observation through illness and death.

After Nasha gives Mickey a final kiss and pats his cheek, a Medical technician named Arkady escorts him into the isolation chamber and fits him with a scanning helmet for continuous upload. The cramped cylinder is just wide enough for Mickey nearly to reach both walls with outstretched arms. A metal chair also serves as a toilet; a ceiling vent delivers the test material, and a drawer holds snacks in case he does not die immediately. The helmet preserves a record of his experience, including information the researchers may want to ask him about later. It also makes the chamber a site of both bodily exposure and continuous data collection.

First exposure and Nasha’s vigil

The first infection develops with frightening speed. Mickey initially questions whether symptoms could begin so soon, but he soon spikes a fever. Arkady returns to ask what he is feeling, then leaves after Mickey describes flu-like symptoms. Within three hours Mickey is coughing; half an hour later he brings up blood. Nasha remains outside the chamber window, talking about the planet visible through the viewscreens, Arkady, and a drama she has watched. She also speaks about what she and Mickey might do together after he comes back from the tank.

At the four-hour mark, Mickey tells Nasha to leave before his condition worsens. She refuses. When the danger becomes clear, she persuades Arkady to let her enter in a biohazard suit. As Mickey coughs hard enough to crack a rib and brings up pieces of tissue, she holds his hand, cradles his head against her belly, and talks him through the ordeal. He dies of pulmonary hemorrhage about an hour later. Nasha’s presence cannot change the outcome, but it changes the experience of dying: the experiment’s isolated subject is accompanied by someone who refuses to let protocol turn his final hours into an entirely clinical event.

Mickey wakes naked and covered in residue beside the portable regeneration tank. His return does not end the trial. He spends most of the next week with Nasha, talking, playing a card game she brought from the Drakkar, and holding her. After four days, Burke administers six injections: two immune boosters and four vaccines against the microorganisms that killed Mickey’s previous iteration. The plan is to wait two days for the vaccines to take effect and then expose him again. Burke offers no assurance of success; he considers survival unlikely.

Repeated tests and lost memories

The next iteration, Mickey4, removes the leads from his scanning helmet as soon as the chamber vents open and takes the helmet off. As a result, the later Mickey does not remember what happened to him. He learns from surveillance footage that Mickey4 died in Nasha’s arms, much as an earlier iteration had. The interruption exposes a limit of the backup system: Mickey’s body can be reproduced, but experiences that are not captured by the upload do not necessarily carry forward as personal memory.

Mickey4 lasts more than twenty-four hours before showing symptoms, but the illness then advances rapidly. It first empties his gastrointestinal tract, causing severe bloody fluid loss, and then attacks his liver and kidneys. He is septic by hour thirty-two, unconscious by hour thirty-six, and dead by hour forty. Mickey wakes again to find eleven needles waiting for him. The progression from one lethal exposure to another is not presented as a single accidental catastrophe; it is a repeated procedure, adjusted with vaccines and additional interventions, while the researchers continue to seek a result.

After another exposure, Mickey feels fine for three days, though he becomes stiff and irritable from trying to sleep in the chair and is running low on snacks. His medical examination appears almost entirely normal: blood work, physical examination, and skin, throat, and sinus cultures show no problem. A whole-body magnetic resonance scan, however, reveals a reason to keep him in the chamber. Burke cannot identify the cause and orders that Mickey remain isolated until the team does.

Parasitic infection and consequences

The hidden infection is parasitic worms that consume Mickey’s brain from the inside. The disease takes nearly a month to kill him, with the last week leaving him barely an empty shell. During the second and third weeks he develops headaches, seizures, and progressive dementia. The parasites’ effects reach his perception and thought: the walls seem to speak, telling him that Nasha does not love him, that his other iterations are in hell, and that the worms will keep eating without allowing him to die. Those claims are delusions produced by the illness, not discoveries about Nasha or the afterlife.

After Mickey dies, larvae emerge from his mouth, nose, and ears. The researchers never learn the next stage of their life cycle: Arkady sterilizes them and disposes of the remains in the colony’s biological recycler, where material can be broken down and reused to make a new Mickey. The episode joins medical research to the colony’s material infrastructure, turning the dead body and the pathogen into different kinds of inputs for continued survival. It also leaves the scientific question incomplete: the worms’ life cycle is cut short even as the exposure has revealed that they can infect and kill a human host.

The trials make the colony’s dependence on Mickey’s replaceability visible. His consent to the Expendable position was given with broad knowledge that the work could be lethal, but each specific exposure subjects him to pain, prolonged observation, and the possibility of losing memories across iterations. Nasha’s vigil supplies the human counterpoint to that system, while the scans, cultures, injections, and postmortem handling show how completely his body is organized as an instrument of research. The trials are therefore both a necessary attempt to understand Niflheim and a record of the cost imposed on the person made to answer the colony’s questions.