This 'serum' you are talking about was a project that the pemc was working on, called overdrive. the serum was the first step in making the overdrive system, which is basically a combat training machine.
Story Progression, TF141john, alexis
"show me...."
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it had been his own version of the good doctor vanderson's serum that deryck had used on the girls. the only thing he did not yet know about the serum was why it worked or did not work.
Anal, Bondage, Human, M/F, Machine, Oral, Torture, Vaginal, Wolf, flashback
Before albert was to administer the serum in to the boy, a thought crossed his mind, "all of the simplest of serums killed in a few minutes, perhaps this one will kill me in moments."
Compassion, Concequences, Death, Dragon, Feral, Fox, Growth, Horror, Komodo Dragon, Manipulation, Monster, Muscle, Mutation, Therapy, Vixen, beasts, flashback, forgiveness, furry, gene, geneplicing, genetics, monstrocity, morph, murder, shots, super soilder, writters competition
The serum in which was injected inside them had the capability to remove all goodness in their heart and soul, leaving nothing but rage, anger and madness.
Apophysis, Cyborg, Future, Metal, Novel, Steam Punk, Story, Wolves, gear, preface
The serum comes in male and "female" doses. the male is blue and is for the man of the relationship. in our case, it would be drew since he is the harem owner. the blue serum is basically concentrated viagra.
69, Anal, Bull, Hotel, Impregnation, Kangaroo, M/M, Male Pregnancy, Mating, Rimjob, Yiff
serum!" he said hurriedly as he approached, to which vincent shook his head. "what?" he asked, before othello continued.
Bahamut-255, Destruction, Dragon, Gila monster, Growth, Lizard, M/F, Macro, Reptile, Terra Crescent, Windragon
After a month together, nikki not only got the transformation serum ingredients, but an extra ingredient to the serum to alter the mind.
Anthro, Drama, Fox, Noir, TG, Transformation, Transgender, furry, tf, tftg
serum... only makes more...more eggs... more cum....more!!!"
Ball Growth, Big Balls, Breast Growth, Breeding, Cum Inflation, Dragon, Dragoness, Ejaculation, Growth, Hyper, Hyperphallic, Macro, Milk, Oviposition, Pussy, Virility, fertility
Though the pair could not see nor hear one another with a sound-proofed concrete wall between them, they did end up taking the serum at roughly the same time.
Anthro, Anthropomorphic, Bovine, Bull, Cow, Family, Farm, Father, Hooves, Horns, Human, Hybrid, Male, Muscle, Muscles, NSFW, Naked, Pain, Plot Development, Science, Series, Story, Story Progression, Story Series, Transformation