When the switch was flipped the metallic sphere standing between the five growing heroes began to light up, a strange hum filling the air. Within seconds yellow particles began flitting and darting out of the Avengers and into the metal orb, draining them of the energy saturating their bodies. Looking down at themselves the five afflicted Avengers slowly noticed their bodies shrinking back to normal, the excess hair fading as their muscles lost definition.
"It’s working." Smiling as her height diminished to 9 feet tall Carol looked to the others and found them going through the same thing. "Keep it up Richards, we’re going to be back to normal in no time." Seeing the tiny yellow dust fly out of her fingers and into the energy siphon she thought it was finally over, until something began to go wrong. Near the end of the transfer the energy stopped in mid-air, floating for a split second before snapping back and flooding into the Avengers again. "What’s… Going… ON?!"
Standing back and resetting his glasses Reed Richards looked to his wife in confusion while pulling out his note pad to take more notes. "Oh my, something… Medical is happening."
The radiation that was polluting their bodies began pouring right back into them, swelling their muscles and bodies larger with each second. Hair sprouted out all over their bodies, becoming shaggy and thick like fur, reeling back the five Avengers gasped and moaned as the radiation had fully returned… And began pulling more! Suddenly the siphon started blasting the Avengers with raw electricity, zapping them like lightning rods and causing the lights to flicker.
"Oh my, Susan is the camera still recording?"
"Yes sweetie…"
Growing under his breath Steve Rogers moaned as his bones creaked and grew to carry more muscle, the electricity actually being absorbed and feeding more growth. Looking at his hands he could see his finger nails grow thicker, curving into claws like some kind of werewolf. Looking down his feet began to change, his toes growing larger and splayed out while his big toes travelled half way up to his heels. Arching his back he felt his spine change as a tail sprouted out behind him, growing longer and thicker until it reached the tiled floor. By now the cloth he had tied around his waist had ripped off to expose his growing cock, fully erect and easily the size of a traffic pylon, his balls swollen to the size of grapefruits.
Now twenty feet tall and still growing Captain America looked over to the others and found them just as big and huge, but when his eyes fell on his teammate the She-Hulk all rational thought left his mind. Over twenty two feet tall and build like a bulldozer the green furred giantess gritted her fanged teeth while wrapping her hands around her car tire sized breasts, squirming with her new feet with a noticeable blush on her cheeks. Steve’s eyes wandered over her wider hips, thick muscular thighs, bulbous rear, softening belly and matronly breasts and something clicked in him. Snorting like a bull in a rutt Steve stomped over to Jen and slammed into her against the wall, pinning her there as he hoisted her muscular leg over his waist and drove his raging cock into her drooling folds. With a howl the two mutating creature fell into a rhythm, instinctively bucking their hips against each other and biting softly against each other’s shoulders.
Carol and Natasha had done the same, pouncing on Tony like a pair of jungle cats the size of elephants and clawing at each other to straddle his bobbing erection. Moaning like an animal in heat Ms. Marvel shoved her furry breasts into Stark’s face, her heavy tail swishing behind her with each gyrate of her hips. Another howl of pleasure and Carol found her lips claimed by her teammate Black Widow, the black furred creature straddling Tony’s face as both women made out on top of him.
With a dominating roar Steve came hard, his testicles tightening as he flooded Jen’s pussy again and again, her legs wrapped tightly around his waist as her claws scratched at his back, his tail swinging angrily just as the electrical current flowing through all five of them died out.
"And… There, it’s turned off." Wiping his hands Reed looked out the window to find several city blocks flicker their lights before everything came back to full power. "Any longer and who knows how much energy you all would have absorbed, hmm… Susan did you record everything?"
Finding herself mesmerized by the five giant creatures still going at it the Invisible Woman caught herself and blushed before checking the cam-corder. "Hmm? Y-yes Reed, still recording, still have a full hour left too…"