Zack Zilla
A 30 minute commission for Kobuld on FA (https://www.furaffinity.net/user/kobuld)) of his character Zack Zilla's backstory. A tale of how a human marine became a muscular dinosaur/kaiju.
Story contains transformation, growth, and vore, with implied CV at the end. No one under 18 allowed.
Thanks again for commissioning!
“And who is the next subject to test?” A shady man dressed in a black suit said to his subordinate as he looked over a clipboard of data points.
“Zack Zilla.” The subordinate replied, “Private in the marines. Had high field marks. Some of the science brass think that he would be a good candidate. Hopefully they’re right this time, given what happened to the others.”
“Very well, send him in.” The shady man replied.
A loud hydraulic door opened up and Zack Zilla, a young and handsome marine entered the darkened room.
“Hello?” He said, “It’s Zack. I was told to report here? What am I doing here?”
A soft hiss came from the intercom above him. “Good afternoon Zack.” The hissing and cracking voice replied, “I will give you the lowdown. You have been selected for a special program due to your high marks. There is a secret service that I am in charge of, lots of undercover and nasty work. You have the chance to join our ranks, but first you must undergo a quick physical and your body must accept the changes we will make to it.”
“What...what kind of changes?” The man said.
“Nothing too drastic.” The voice lied, “We have an experimental fission and fusion reactor that we have learned to mesh with bio-organics. We will implant it in your stomach. If it works properly, you will be able to digest any sort of food that you eat. We have determined that it will be helpful for eliminating food allergies and better assimilating into other cultures that we might have you infiltrate.”
“So I can just eat anything?” Zack said, “That doesn’t seem too bad. Why all the cloak and dagger stuff?”
“We have our reasons, Zack.” The voice said, “Now, if you would please, there is a slab in front of you.”
A single light appeared in front of the marine, showing off the large stone slab with several straps connected to it, intending to keep him tied down as the experiment proceeded.
“Please lay down on the slab, and we will begin preparations.”
The marine did as he was ordered, and walked over towards the slab before laying flat on his back. Up in the control room, a series of buttons were pushed, and the straps and latches wrapped around his arms, legs, and middle, keeping him in place.
“Whew, that’s cold.” Zack said to himself.
“Now, Mr. Zilla,” The voice on the intercom said, “It will be in your best interest to be as still as you can.”
“Roger that.” Zack said, and sat in silence as a light hum came from above him.
A panel in the ceiling had opened up, and a set of mechanical arms holding syringes were coming down from above. Zack didn’t know what sort of fission engine they were referring to, but if he had to make a guess, he would assume those were sedatives so that he wouldn’t feel much pain if they had to operate or cut into him.
“Deploying steroids now.” The aide said, pressing a button on the panel to inject Zack with the first round of chemicals. The needle entered Zack’s flesh and injected the payload, pumping the marine full of muscle stimulants and growth hormones.
“All signs normal.” Another tech said. “Inserting experimental genetic dinosaur genetic material.”
This was where the last few tests had failed, with the other subjects reacting poorly to the overwriting material. Their breaths were held as another mechanical arm came down and injected Zack with the yellow and green liquid. Zack winced as that needle entered his arm, wishing he could rub at it, but then started to feel a bit sick.
“All vitals normal so far.” A tech aide said.
“Are we almost done?” Zack said to the darkened room.
The workers were silent for a moment, as sixty seconds was the first sign of when things would go wrong. Each tick of the clock hand would feel like an eternity as they waited. Then, when a minute passed, nothing had changed.
A sigh of relief had fell across the room. This subject could be a complete success!
“Just two more. Mr. Zilla.” The intercom cracked.
Some more buttons were pushed, and a third mechanical arm injected Zack with experimental and illegal technology. Already, their signals were showing an increase in size in the marine, and this would be able to increase it exponentially.
“Final one.” The tech aide said, and a large needle carrying the engine reactor was coming down from above. Zack was starting to shake, feeling the stimulants going through him. But he needed to stay still. But that final syringe was almost as big as his forearm! Was that the engine they were going to put into him? Zack gulped once and closed his eyes, not wanting to see this come to him. He could feel the tip of the needle press into his stomach, and then yelped out in pain as he felt it pump into his body.
“Injections complete.” The intercom said, “Now, we will ask you to stay still for a moment, Mr. Zilla, as we run a check on your vitals.”
There was a light moan coming from Zack as all the chemicals and mysterious liquids that he had been injected with were starting to take his toll. He was feeling incredibly green at the gills and felt like he wanted to vomit. The straps were feeling tight as well, like he was growing even larger while on this slab.
“What is going…” Zack slurred, but then swallowed deeply, trying to keep his lunch down, but then belched out loudly.
Up in the control room, things were going smoothly as they checked on his vitals, but then suddenly red alarms started to blare and flash!
“What’s wrong? What’s going on?” The shady man ordered.
“It’s the dinosaur genetics!” One of the techs said, “It’s reacting to the muscle stimulants and crispr tech!”
“The hell is happening?” Another scientist said, watching the changes start to take place in the room below.
Zack’s green feeling was starting to spread, as he began shaking and howling out. The marine was feeling tightly constrained by the straps and was now visibly trying to yank and pull them off, as they were constricting his blood flow. A deep roar came from the marine as he yanked hard, snapping them off the slab as he worked to free himself from his confines. His whole body was shaking as he fell into a fetal position, but then watched as his arms and body started to cover in muscles and scales.
His eyes went wide, turning yellow around his pupils and they began to slit. He saw claws forming on his fingers as his body continued to change and mutate.
“What’s...happening…?” A deeper growl and guttural grunt escaped from him as he arched his back, feeling a thick tail push out from the bottom of his spine. It was covered in spines and spikes, each spading outward as it began to match his own height in size! His feet began to push out of the tips of his steel-toed boots, shredding the metal as claws ripped through the leather and protective covering.
“Someone get in there and restrain him!” One of the scientists shouted.
A second door to the chamber opened up and a guard armed with an electrical wand rushed out and tried to subdue the growing monstrosity. The sudden zap shocked through Zack’s system, but at his growing size, it was like a static electric shock.
Another primal growl came from Zack as he turned around suddenly, tripping the guard with his tail and knocking him over. He didn’t know what was coming over him, but he soon felt a grumble in his gut. The changing dinosaur grabbed at the guard and squeezed him tightly in his hands before shoving him into his mouth and swallowing him whole!
The scientists could only watch as the guard was sent shouting down to Zack Zilla’s growing gut. The engine was efficient, and working exactly as designed. The poor soul would soon be nothing but mass and meat on Zack’s body, and his scaly hide kept expanding out. His normally muscular form getting a very rounded dome belly as he continued to change. Amazingly, his uniform was still fitting, using the experimental nanofibers to keep up with any changes in mass. His pants had been reduced to bulging shorts, however, but it was still within code.
“Get him subdued, now!” The leader said, but then the growing dinosaur began expanding even further!
His body was already filling up the chamber, muscles and mass bulging out the walls and making them crack. The control room was awash in red lights as the eye of the dinosaur was level with them, but then soon shot upward even further! A sudden crash and collapse echoed through the room as Zack gripped the small room and tore it off of the wall!
The scientists and technicians were scrambling as Zack was outgrowing the entire facility. Guards were running to try and stop him, while the scientists were trying to flee. Most were caught under his bulk as Zack passed one hundred feet, then two hundred. The huge dinosaur was still growing, reaching sizes of skyscrapers!
Those in the control room could only watch as they too were shoved into his mouth, swallowed down by the dinosaur kaiju that they had created, and soon would be more size on his massive domed gut. But still, Zack was growing, still wearing his marine uniform. By the time he stopped, he was easily five hundred feet tall, a massive testament to the experiment, if there had been anyone left to be impressed by it.
Zack’s eyes narrowed as he looked down at the building he had just grown and smashed out of, and then felt his arousal slip down his pants leg. A thought ran though his mind.
Perhaps his arousal could eat it.
A toothy grin crossed his face as his cock began to open wide and then descended on the building and surrounding landscape...