To Protect and Serve - Part Two
"unfortunately the serum they developed was created using predator-related genetic markers.
Horror Vale - ch 14
"show me...." ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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.
Expendable
Even with the serum however, nobody in their right mind would take this job, and that's why diamondsky sends down the chumps.
Runaway Experiment: Part 8 - Destruction
The serum might take a while to kick in, so the plant might just have enough time to yiff us too. or, worst case scenario, the serum might not work at all." camry told the officer. andronia shuddered at the thought.
Big Changes Part 1
The serum soaked into the cut and the transformation started almost immediately. his hand began to tingle as the skin became tough and scales began to form.
Inflation Intoxication: Chapter One
Apparently, just one drop of the serum was more than enough to grow an ant to the size of a horse – when applied with a dropper over the top of the ant, submerging it, however briefly, inside the droplet of growth serum.
The Breeding Stock [CM]
Kov paused for a moment, surprised at how feminine his cum now tasted with the serum, holding it there as he mentally prepared himself for this.
Saving the kennel v2
"so anti-serum ready?" he asked but tony looked nervously away and started talking "well...
The Depths of Depravity (part three)
Hm… so, it seemed that the serum, inadvertently, through the males into the females, had a secondary effect. for she'd never quite seen a bitch fall like that before, not without the addition of her serum.
Dad and Son Have Some Bovine Fun
I thought i was gonna be a bull…” his dad bit his lip, “i dunno, maybe they mixed up the serums when they packaged them, hell you’re not even the same breed as me. i ordered two red angus serums, but you’re a female jersey!”
Scientific Advancement Goes Moo
She gently taped the serum vial with her hoof, pushing it toward her friend. "what's this?" rebecca knelt down slowly and picked up the serum vial, which was now coated in formula itself.
Vested Delights
A bio-testing nurse-technician named alice sprogen became infected with the serum in a freak accident.