A Marvel Cinematic Universe TF Story
(People into Various, Animal TF, TG, Age Progression, Age Regression)

Thanos was no more.

They were four words that seemed impossible, but the God of Thunder smiled as he looked to his friends. The Infinity Stones were in their grasp, as well as a gaudily golden gauntlet. He crossed his arms, leaning back against the nearest wall and watching his comrades revel in victory.

“In all honesty, I’m just glad to be me again.” Bruce Banner joked, relief plain on his face. He settled into Black Widow’s arm, content written plain on his features.

“Yeah, well… We are too.” Captain America replied, an easygoing smile undercutting the jab. Still, it was one that Tony picked up on, as was expected.

“Was that a joke? I didn’t know you could still make those, what with the beard and all. Kind of implies a more, serious nature, you know?” The man ejected himself from his armor, stretching and heading straight for the bar. “I think that calls for something in celebration, don’t you?”

“As long as you have something strong!” Thor laughed to the man, unfolding his arms. “Worthy of the Strongest Avenger.”

“Bruce doesn’t drink.” Black Widow pointed out, laughter filling the room.

As it died down, Thor’s smile faded. “Still. I can’t help as though think we’re forgetting about something…”

“Or someone.” A new voice entered the conversation, and the Avengers turned their attention to the speaker. Green robes, weasely, and a cruel smirk… It could be none other than Loki, back from the dead. Again.

More concerning than his arrival was the fact that he held the Reality Stone in his hands. “You know, it’s a little funny. This all started with me, in a sense. And now it’s going to end with me. Maleketh had no idea the power this stone holds…”

“Brother.” Thor held up a hand forestallingly. “I know we’ve had our differences. You stabbed me, I put a neural disruptor on you, you stabbed me. But this is something beyond your power. Using an Infinity Stone is dangerous.”

“For some.” Loki admitted, his dark hair catching the light as he tilted his head. “Then again, I’ve always been a little different. Maleketh had wanted to cover the universe in darkness, but that’s so simple-minded. He could have just erased you, erased all of you from existence.”

Everyone in the room tensed as the stone flared to life, its red light casting hard shadows across the room. None of them seemed to be disappearing; however, which was all things considered a plus.

“But where’s the fun in that?” Loki smiled widely. He turned towards Black Widow, lifting the stone. “Natasha, dear little waif. Remember when you mentioned all that red on your ledger? Consider it wiped.”

Black Widow stiffened, her lips working soundlessly as her brain was overwritten. It was like her mind was a sandcastle and he’d just conjured a tsunami. Everything that had made her who she was completely vanished, and in its stead was a sporty, suburban mindset.

“Oh my God. Oh my God. That’s Loki.” Her voice remained the same, though her body lost its toned figure. She wasn’t suited for fighting, after all-not counting other soccer moms who tended to get lippy with her. Her thighs and belly swelled slightly, giving her a healthy look bordering on chubby.

“And so it is. Brother, remember when you said that I couldn’t change?” Loki turned to his sibling, beaming at the dislike in the man’s remaining eye. “Clearly you were thinking of a different usage of the word.”

“Wait… I mean… Loki?” Natasha continued, blithely gawping at him. “What am I saying? Lance, what are you even wearing?” She spoke to the God of Mischief as though he was her neighbor, because in her mind, he was. She then turned to the man at her side, tutting. “And what are you doing on the couch, boy? Dogs aren’t allowed on the furniture!”

Loki laughed hard at how phenomenally easy it was, and as such left himself open to Captain America’s incoming attack. A right hook connected with his jaw, and he staggered, falling over an ottoman in a disgruntled heap.

“And Captain! Bad dog!” Natasha chided, rising from the couch and waving a finger. “Don’t make me get the spray bottle!”

“Easy, Nat. I’ll fix this.” Captain America growled, curling his fist and pulling it back past his shoulder. He’d sent Thanos reeling with a hammer blow like this. Against Loki, it would really, really hurt.

“Bad dog!” Tony added, and the punch jerked to a stop.

Captain America turned towards his friend, eyes widening as he saw the man’s facial hair recede, watched the man’s hair lengthen. It was insane to see, but Tony was clearly becoming Tonya. Which meant that he…

The blonde looked down to his chest, huffing in a canine fashion as he saw fur creeping up his collar. It was brown and black, darkening towards his shoulders and back. Captain America had seen enough police dogs in his life to recognize the coat of a German Shepherd, and he struggled to retain his mind.

“Tonya, if you don’t get your dog under control this instant!” Natasha called.

“I know, mom! Ugh!” Tonya stomped a foot on the ground, smallish breasts lifting her shirt. She turned to the changing man with an anxious smile on her face, patting her knees. “Come on boy, sit for me? Mom’ll make you sleep outside if you don’t…”

Captain America whined like a dog, dropping onto his haunches. Loki watched this with a vindictive smile, turning towards his brother and the NUISANCE. “Stay.” Loki commanded his brother, walking towards Banner with ill intent.

Bruce lifted his hands uneasily, a nervous smile on his face. He watched Captain America’s face extend into a muzzle, then looked to the decidedly attractive Tonya. “Hey, um… Kind of regretting having the big guy sealed away right now…”

“Oh, I can imagine.” Loki snarled, only to slowly smile. “Although… That could be fun too, couldn’t it? Letting the ‘big guy’ out to play? I know you want to be the rowdy mutt you are at heart.”

Bruce struggled to resist, but PHDs were little barrier against the cosmic might of an Infinity Stone. He nodded his head, flopping his lengthening ears and growing jowls. The man fell onto all fours, his tongue lolling from his mouth. Drool beaded at the tip, falling to the floor in large volumes as he began to shift into a St. Bernard.

“What was that, boy? Did you want to tell me you liked being such a good boy?” Loki chuckled, leaning down towards the St. Bernard’s face.

“ROWF!” Bruce barked loudly, slobber covering Loki’s face. The God of Mischief had enough time to regret his choice of breed before the dog pounced upon him, affectionately tackling him to the ground and covering his face in thick canine drool.

Loki yelped in an undignified fashion, looking up to the two women for help. “Could one of you get him off of me?”

“Hulk! Here boy! Here boy!” Tonya patted at her knees, but the dog ignored her in favor of play-biting his favorite chewtoy of a neighbor.

Natasha rolled her eyes, walking up to the dog and holding one of his paws in her smooth hand. She stroked it gently, looking into her dog’s brilliant emerald eyes. “Come on boy, easy. Sun’s getting real low, just calm down…”

The St. Bernard shook his large body, panting as he hopped off Loki, letting the man scramble back to his feet in an unforgivably undignified fashion.

“I really wish that would stop happening.” Loki muttered darkly, turning towards his frozen brother, the last Avenger. A look of disgust spread across his features, the kind of expression that could only be mustered from centuries of sibling rivalries. “You know, I thought we were past our differences. But I offer Thanos a stone to save our lives and you just go back to calling me a villain.”

Thor gasped as he regained the ability to speak and move alike. Lightning coruscated around his body, startling the dogs and women as he glared to his brother. “Change them back now, brother, or I swear on our father’s soul that you will suffer.”

“But you just want to live in the past, don’t you, girl?” Loki stressed the last word as he continued, ignoring Thor’s words entirely. “So, since you’re so keen on living in the past, how about an old trick? Get help, girl!”

Thor grunted, falling to his knees. Lush black and white fur sprouted all over his body, covering him from head to toe. His eyepatch fell from his face as it extended, though the hole it concealed was filled with an eye once more-albeit one that couldn’t see the world in the same light.

The Asgardian’s back arched as a tail extended from his spine, wagging as his tongue lolled from his mouth. What little hair he had fell from his scalp, replaced by lush fur, and he barked. “ROWF!”

“What’s that, girl? Little Timmy’s fallen in a well?” Loki laughed at the animal’s distress, noting with sadistic glee that she was growing teats.

Thor growled, though was unable to resist the physical changes. Her mind remained somewhat intact, certainly enough to plot revenge against her brother. The irony of her wanting revenge didn’t escape her, nor did Natasha’s call.

“Oh, that’s my girl! Such a smart girl, such a good, good girl! My Princess!”

The dog’s ears curled from her head, perking up as her lips darkened. She wagged her tail harder and panted at her owner friend owner. It was so hard to think owner that she was human dog owner owned by Natasha comrade…

Her thoughts were a mess, and it was only made worse as Natasha scratched her behind her ears. Canine pleasure obliterated the Asgardian resistance that remained, and Princess pressed her paws on the buxom MILF’s shoulders, covering her face in slobbery licks.

Loki chuckled, then shook his head. “No, no… A Border Collie might be a little too dignified…” As he spoke, Princess’s legs shortened, losing half her height in the process. The dog let out a loud whimper as she now barely came up to her owner’s hip, and she pawed at the woman’s generous thighs needily.

“Outside? Outside?” Natasha cooed, giggling at the Corgi mix. The Avengers HQ shifted around them to a traditional house, carpeted with pictures of Natasha, Tonya, and their precious dogs. There were even a few trophies for academic excellence littered about the place-Loki begrudgingly had to leave Tonya that. Even if the girl’s mother wasn’t rich enough to send her to university, at least she wouldn’t end up in retail.

Though she might have a career on the streets, Loki mused as Tonya sashayed up towards him. “Oh? Something to say, Tonya?” He asked, a grin spreading across his features as he looked to the borderline-nymphomaniac collegiate.

“Like, nothing you haven’t heard before, Lance.” The dark-haired girl licked her full lips, only to yelp as her mother rudely shoved her to the side.

“Chores, young lady! In the meanwhile, I have some catching up to do with Lance…” Natasha purred, stroking the man’s muscular chest beneath his robes. “Once we get him into a proper outfit.”

“Mom!” Tonya huffed, folding her arms. “It’s called ‘cosplay’! Lance was gonna go with me to the convention!” Little Princess yapped in agreement with her, the dog protective of her owner.

Loki guffawed, the plan working far better than he’d ever possibly have imagined. “Ladies, ladies! There’s more than enough Lance to go around.” He spread his arms wide in what he thought to be a magnanimously humble fashion.

“Oh, Lance.” They both cooed, gratuitously simpering. Their dogs, on the other hand, had decided now was a good time to panic about the sudden change of locale. Apparently their canine brains noticed the shift, which left them barking and scrabbling at walls and doors.

The women yelped, and Loki sighed as he realized his fun was at a temporary end. “Although there’s still more fun to be had… What shall we do with the rest of the Avengers?” Loki laughed, leaving Natasha and Tonya to take care of the dogs.

“Perhaps the insect Avengers into their namesakes… No, too predictable. Maybe predators of their namesakes: a frog, chameleon, and perhaps a rodent… Of course I’ll need to rework those Wakandans into animals befitting their sovereign empire. And what of the ‘Guardians of the Galaxy’…” The power-mad man giggled with glee. “The possibilities are endless!”

Eyes bright, face split into a wide grin of the sort born from triumph, Loki took a step forward into his new life as conqueror and promptly fell into a hole. It wasn’t a typical hole, rather this was one spawned by magic, a neverending freefall. A ‘freaky hole’, as it were.

This had happened before, once. The damnable human magician had done this to him, a man by the name of

“Strange.” A cocksure voice spoke, and a gloved hand snatched the stone from Loki’s hands. The God of Mischief fell onto a hardwood floor, grunting as the wind was knocked from him. “I’m taking that, by the way.”

Loki looked up to see Doctor Strange’s infuriatingly condescending smirk, the man holding the gem in his fingers idly. A glowing aura surrounded the tips of his fingers, no doubt containing the energy that dwelled within the stone.

“How?” Loki snarled, rising to his feet, conjuring a trio of daggers. He used them to punctuate his next words, arm flinging the blades at the mortal. “You! Were turned! Into a squirrel!”

Doctor Strange had the gall to stifle a yawn, surreptitiously lifting a hand and dodging the blades with seemingly no effort. His cape flitted behind himself as he weaved a complex sigil with his hands, and the stone flared to life. “You didn’t think I wasn’t prepared for that… Did you? Honestly, I’d explain but speaking so slowly really wouldn’t be a good use of my time. Not when I need to fix your mistakes.”

Loki growled, illusionary copies of himself springing to life around the charlatan. He sent two circling around the man’s back, with another coming from either side. Ideally the man wouldn’t notice him chasing nuts tail nest squirrel hide

“Wait.” Loki grunted, his hand lifting to his forehead. He felt fur against his palm, and a cold sweat dewed along his back. “What have you done to me?” his voice rose in pitch as his teeth bucked, his clothes beginning to billow around him as his height halved.

“A taste of your own medicine. Doctor’s orders.” Doctor Strange smirked. The man loved his jew job sometimes, and this was one of them. Seeing the cocksure Asgardian descend into a common squirrel was a privilege reserved for only himself, and he reveled in the power.

Then he put an increased dampener on the stone, tutting as he looked to the red stone in his palm. “You know, I can feel you doing that.” The man smirked, returning his attention to Loki in time to see the Asgardian sprout a long, furry tail.

Loki was panicked, more so than he’d ever been in his life. He was always a squirrely sort, and now that the statement was becoming literal he was unable to control his anxiety. This wasn’t supposed to happen, he wasn’t supposed to change into an animal! He was a squirrel breed nest mate nest nuts

Doctor Strange watched the squirrel dart away from him, sprinting towards a window the sorcerer had conveniently left ajar. “What, no last words? I’d expected a little more from… Ah, changed him too quickly.” The man tutted, slinging a portal to life between his study and the Avengers HQ.

He walked into a scene of turmoil. A mature, if he wanted to use a kind word, Black Widow chased around a German Shepherd with a star on his face and a St. Bernard with green eyes. Meanwhile, an Apple Watch-wearing dark-haired girl hugged a Border Collie-Corgi mix with rather luxurious fur, who yapped incessantly at the group.

“Um. Hi.” Doctor Strange waved a hand, correctly surmising who was what. It didn’t take a PHD to sort them out, though the spell that had been cast was one he’d be hard-pressed to break. Restoring himself was simple, since it was his own body, his own mind. To recreate comrades he barely knew…

“Ohmygod.” Tonya gasped, hugging the Thorgi tighter with one arm while she fished for her phone. “You’re totally, like, one of those superheroes who saved the world and stuff, right?”

“As were you.” The man muttered, his brow furrowing in thought.

Tonya blinked, not too confused to snap a much-desired selfie, but confused nonetheless. “Come again?” She asked, tilting her head.

The man sighed, feeling much older than he had any right to. “Nothing. It’s just… This is going to take a lot of work to fix.” At the last word in particular, the dogs seemed to panic, returning to the yapping chaos that left him with a ringing migraine.

Doctor Strange groaned, kneading his temples. “That said, at least I know I can resolve this.” He stressed the word, though it didn’t calm the dogs in the slightest, or the women attempting to corral them. “At least… I think I can.”