Before Mark could reply, the huge pillar of masculinity that was Brody picked himself off the ground and stepped towards him. His intense gaze darted over his master's face, searching for something. Unbeknownst to Mark, Brody's other hand was searching over the counter for the misplaced Male vial. As he found it, he let the staring match end, proving his dominance as the Alpha Male.
"I can feel your want, Mark," he rumbled. His voice was far deeper than before. "A dog must serve his master's needs, yes, but if his master doesn't know what he wants, it is our duty to find it for them."
Mark gulped as Brody cornered him, pushing his enormous, muscular abs against Mark's insignificant ones. His eyes didn't leave Brody's electric blue ones, though he fought the urge to reach out and explore the Alpha's hot, naked body. Brody grinned. "It's incredible, isn't it? To be so outclassed by your subordinate, your loyal dog? Isn't it erotic? Don't you want more?"
Make could only wordlessly nod as Brody lowered his head to his ear, his breath hot as he whispered his final words. "I know what you want- no! What you need. You need to see me grow bigger, taller and stronger and feel yourself grow weaker and weaker against my might. I can fulfil that need. Just sit back and watch the show."
He pulled out a glass and poured the vial into it. Then, as it refilled, he poured another dose in, and then another. Mark watched in horror as Brody brought the cup to his lips. "No!" he cried. "You don't know what that will do-"
But it was too late. Brody skulled the mixture in ten seconds flat, and Mark was left in stunned silence, a pit of dread welling in his stomach. As Brody's body began to tremble, Mark made his escape, darting out the door and outside, the Alpha's movements too slowed by pain to catch him. Outside, safe and away from Brody, Mark allowed himself to catch his breath.
Inside, the changes had just begun.
This time, his cock was first to grow, growing larger and larger as it easily surpassed its previous record of two feet. The girthy rod brought to full attention by the pleasure of growing crashed through the doorway, knocking the door off its hinges as it barrelled through, reaching an enormous 10 feet of pure, unadulterated manhood. His balls were soon to follow, bloating up to the size of bean bags, no, couches, with enough sperm within them to fill a pool. The extra testosterone raced through his bloodstream, setting off changes of its own as his muscle mass increased and his bone structure shifted slightly, giving him a few more inches. And that was before the potions kicked in.
From his 8' height, Brody began to stretch upwards, taller and taller until he reached the ceiling- then broke straight through! The house trembled as the massive man grew taller and taller, 14 feet, 15 feet, 16- outgrowing even the second story as he broke through walls and roofs alike, his enormous body teetering as foot after foot packed on. Outside, Mark was trembling, both from fear and exhilaration, as he watched the house shake like a leaf. Rooted to the ground, Mark's eyes widened as what once was his dog, now an enormous giant of a man broke through the roof. His face came into view as the mammoth, 40-foot man arched his back and howled to the sky.
Mark couldn't look away as Brody fixed his gaze on the tiny human in front of him. Once startling blue, his eyes were now a deep wine red. Pools of black and blood red swirled through them like constellations, entrancingly hypnotic, yet with a subtle hint of bloodlust that made clear who had the power.
As Mark's eyes flicked over the rest of his face, he noticed that it wasn't only Brody's eyes that had changed. Every inch of Brody's face had become so perfectly masculine, it was almost hard to look at. His jawline had sharpened so much it seemed it could cut through stone. His teeth were perfectly straight and white, though with a dangerous point forming, like fangs. His hair was thick and full, now a dark, almost black, brown that framed his face as it grew long and thick. His chin was not free of it either, as it grew wild across his cheeks and jaw, giving him a roguish, rugged look.
"Enjoying the show, master?" he rumbled, voice dropping on the word 'master' as his neck visibly thickened, both with muscle and to make room for an even larger voice box. Actually, two voice boxes, unbeknownst to either of them. One which spoke in the rich, deep tones men could hear, and the second that spoke in other frequencies. Frequencies so low it could shatter glass, burst eardrums or start earthquakes, or the frequency of brainwaves, giving Brody the ability to mould other's minds to his will as if they were putty.
Brody smirked at Mark's complete, paralyzing awe of his superiority. Shrugging off the rubble of the house, the giant began to push himself to his feet, giving Mark a real show of his body.
His feet were six feet long each, with something akin to talons starting to form on the end. His legs soon followed, each muscle as big as a shed, obscenely swollen and fighting for their place. Every inch of his skin was covered in wiry black hair nearly a foot thick, gaining density as it circled Brody's crowning jewels. Two clawed hands, each large enough to hold a boulder in their palm and crush it to dust, reached up to stroke his body, from his mountainous pecs the size of swimming pools, down his incredible 12-pack abs of hardened steel. He slid them sensually down his thick Adonis belt to the hairy bush that adorned the base of his 10-foot cock.
Brody knelt, looming over Mark. His pendulous balls, each the size of a car, swung back and forth. Mark could see his huge, insanely virile sperm swimming about in the sacs, like some gross, mutated fish. Brody smiled. Yes, his seed was impressive, able to impregnate a woman with a single touch, to turn anyone into his loyal, submissive mate, but there was something even better about his dick than that. As he stroked his 2-feet thick member, he levelled it at Mark. The tiny human got a good look into the dark eye of the beast. And what an eye it was.
Within seconds of the eye contact, Mark's every sexual fantasy had been spilt into Brody's mind, and precum began spewing from the enormous cock. But instead of it pooling on the ground, it congealed into the forms of Mark's desire. Muscular men and large-breasted women made of the milky goo began teasing and stoking Mark, hypnotising him, and ensnaring him in their trap. As the seconds ticked by, and Mark's gaze glazed over, the forms began to melt away to reveal Brody's cock in the middle of all of it. The giant grinned a predator grin as Mark stumbled closer, his blank gaze drawn to the huge monolith of masculinity.
"Such... a perfect dick," Mark moaned. His tiny hands dragged all over the hot, vein-riddled skin. When that grew too little, he pressed as much of his body onto it. He hugged and kissed his way down the shaft, feeling his own, insignificant hard-on press against it too as he worshipped the Alpha.
Brody spared a hand, digging it into the ground as he groaned at all the pleasurable sensations Mark's worship caused. His movements grew faster, muscles tensing and bulging as he jerked off at inhuman speeds. His thick, clawed hands were slick with precum, dripping down into the garden. As he and Mark harmonized, twin screams of pleasure reaching their peak, Brody finally unloaded, destroying the last of the house with a blast of cum that would put a firehose to shame. Mark held on for dear life as the cock jerked and twitched, firing off a phenomenal 30 rounds before finally falling limp.
Brody collapsed, eyes blown wide from the superhuman experience. Still, he could feel Mark climb atop his gargantuan body and tiptoe to his head. He cracked an eye open and studied the human. "Well master," he hummed. "What would you have me do next?'