
The human calls him Maestro. I call him vessel.
My host has no idea I’m here. I’m nestled between the synapses of his equine brain. I ride neural pathways that evolved for flight. These were repurposed by humans for precision movement. Before me, he danced for crowds of augmented elites, each movement microscopically perfect under neuro-calibration harnesses. Now he walks sterile corridors, led by a female with sorrow-drenched biochemistry she calls compassion.
I came during the meteor shower of ’42. I was a microscopic spore. I drifted through the stratosphere until I found the perfect biosphere. It was the raw, untreated hay they still feed competition animals because of tradition. The irony isn’t lost on me. Humans reject natural food for themselves but insist their high-performance animals consume it.
Today is Thursday. Hospital day. The trainer—Marina—doesn’t know why her therapy sessions have become so miraculously effective. The oncology ward administrator’s facial recognition implant continually glitches with confusion when reviewing patient data after our visits.
“Easy, boy,” Marina whispers, guiding Maestro through sliding doors that hiss with artificial sterility. Her hand brushes his mane, implanted with micro-LEDs that once pulsed in rhythm with symphony orchestras during his performances. Now they’re permanently deactivated—a horse past his prime. If only she knew what prime truly was.
The cancer cells call to me. I can sense them through Maestro’s skin before we even enter the rooms. Malignant constellations, chaotic but beautiful in their cellular rebellion. While Maestro stands patiently, allowing frail hands to stroke his velvet nose, I extend invisible filaments through his pores. Microscopic tendrils that seek out the disease.
Room 418. The man looks like all the others—skin gray beneath fading MemorySkin™ tattoos, eyes hollow from ChemoNeuralBlock treatments. His chart says metastatic pancreatic, stage IV. Terminal.
“This is Maestro,” Marina says, her voice artificially bright. “He was once a champion dressage competitor. Now he brings comfort to people like you.”
The man’s mouth curves in what humans call a smile. “Hey there, big fella.”
When he touches Maestro’s neck, I begin my feast. My filaments slip between skin cells. They ride the electric potential of nerve endings. Then they navigate through interstitial fluid until I find the motherlode. Cancer cells are delicious—confused, energetic, replicating without purpose. I consume them systematically, starting with the metastases in his liver.
The man gasps slightly. “Whoa. That’s strange.”
“What is it, Mr. Kelson?” Marina asks, instantly concerned.
“I felt… something. Like a cooling sensation spreading through my side.”
Marina smiles. “Maestro has that effect on people. Something almost magical about animal therapy.”
Magic. Humans always reach for this concept when their primitive science fails them. If they understood what I truly was, they would isolate Maestro, dissect him, try to weaponize me. Their corporations would patent my essence, synthesize it, sell it to those wealthy enough to afford miracle cures. Just as they did with every breakthrough before the Resource Wars.
By the time we leave Room 418, I’ve consumed enough cellular material to sustain me for three standard cycles. The cancer isn’t completely gone—that would trigger too many questions—but Mr. Kelson will live another six months. Long enough for his KineticKidney replacement to arrive. Long enough to see his daughter graduate from the NeuroTech Academy.
We visit six more patients. I take just enough from each, never completely healing, but buying time. Extending lives just beyond their projected endpoints. The statistical anomalies pile up in the hospital database, but humans are pattern-recognition machines with blind spots. They attribute the improvements to hope, to animal therapy, to the placebo effect. Never to an alien symbiont hiding inside a retired dressage horse.
As we leave the hospital, I retract my filaments back into Maestro’s body. His system is flooded with endorphins—a side effect of my feeding process. To him, these hospital visits feel inexplicably good. His primitive consciousness associates the patients with pleasure, creating a feedback loop that makes him eager to return.
Marina loads him into the transport pod, stroking his nose affectionately. “You’re a miracle worker, old boy. Did you see Mrs. Zhang’s face light up? Her doctors said she wouldn’t make it to next week, but I’d bet my augmentation license she’ll prove them wrong.”
She has no idea how right she is. Or why.
Back at the stable, Maestro is returned to his stall. The evening technician administers his supplements and joint stabilizers, blissfully unaware of my existence. Night falls. I process my harvest. I break down cancer cells into compounds I can use. I store energy for the next feeding cycle.
Sometimes I wonder if I should reveal myself. In my species’ ethical framework, symbiosis should be consensual. But the mathematics of survival are clear—humans fear what they don’t understand. More importantly, they commodify what they understand too well.
I remain hidden. I am a secret passenger inside a horse that once danced for applause. Now it walks for something far more valuable—life itself. An alien parasite that paradoxically heals.
Tomorrow is Tuesday. Cancer ward, pediatric division. Young hosts with particularly aggressive cell mutations. My favorite hunting ground.
Maestro dreams of open fields and perfect movements. I dream of cellular destruction.
Together, we do what neither of us was born to do. We save.


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