Bragging Rights 2: The Art of Bragging

Bragging Rights 2: The Art of Bragging

Part 2

“Question before we start,” Rainbow said. “Is bragging a good thing, or a bad thing?”

Twilight’s heart was pounding. Sweat stung her eyes as she took a lungful of humid air. “U-Um… a bad thing?”

Rainbow crouched her head down low. “Nope. Bragging can be good OR bad. And not just for the pony bragging, but the ponies they’re bragging to!”

Twilight’s pupils shrank as she was swallowed by Rainbow’s monstrous shadow. That fuzzy face alone was so massive, her pupils like glossy caves. “I-I see…”

“Bragging’s about confidence.” Rainbow smiled, revealing her tower-sized teeth. “Showing confidence, and then giving it to others. Yeah, it’s easy to get carried away, but that’s what makes it fun! It’s all about riding the line.”

Twilight was having trouble listening. Even Rainbow’s smallest movements made the ground rumble, Rainbow’s body warmth washing over her. “What do you mean?”

Rainbow’s voice fell to a booming whisper. “Haven’t you ever heard or seen somepony and thought, ‘I want that. I want to be on the top—I know I can be on top!’”

Twilight chewed on her lip. “A-Am I supposed to be thinking that now?”

Rainbow’s eyes gleamed. “You tell me.”

Twilight shivered. She could feel the spell coursing through her, heating her up like a pot of water on a stove. “I-I’ve never really competed before… at least, not seriously at anything.”

Rainbow chuckled. “Twilight, Twilight, Twilight. You might just be the most competitive pony I’ve ever met!”

Twilight furrowed her brow. “How am I—”

“You play a bigger game,” Rainbow said. “A game you’re so good at, you wind up drafting the losers onto your team.”

It took Twilight a second, but she eventually got there. “...Oh.”

Rainbow winked. “You definitely know what it’s like to compete. You know the feeling of wanting others to rise up to your level, to see them become as awesome as you! It’s a good feeling, isn’t it?”

Twilight shifted back and forth. “I dunno… I-I mean, it is, yes, but...”

Rainbow squinted and tilted her head. “You said being a princess means you have to stay grounded. That seems kinda backwards, don’cha think? Why would a pair of wings mean you gotta stay on the ground?”

Twilight was quiet. She glanced at her wings one at a time, stiff and throbbing at her sides.

“If you want ponies to follow you, you gotta convince ‘em you’re worth following.” Rainbow leaned closer, her colossal muzzle like a fuzzy hill. “Think about when you’re talking about friendship. Don’t you believe what you’re saying?”

Twilight shifted in place. Thoughts and feelings were all swirled together in her mind like a smothering blanket. She watched the hairs of Rainbow’s coat sway in the breeze, thick and strong as jungle vines.

“I want you to pretend I’m somepony who’s been living under a rock the last few years,” said Rainbow. “Imagine I’m one of those stubborn jerkwards that’ll walk all over you if you let me—”

Twilight paled.

“Er… not literally,” Rainbow said quickly. “Picture that I only respect ponies that are strong, y’feel me? I need you to tell me about the things you’ve done because that’s the only way you’ll only win me over, and if you aren’t confident, I’m not gonna care.”

Twilight wet her dry lips. “This isn’t really—”

“You’ve worked your plot off to get where you are, haven’t you?”

Twilight flattened her ears. “You know I have.”

“But pretend I don’t!” Rainbow straightened back up to rise high, high over Twilight. “I’m a pony who’s just come to Equestria, and I have no idea how awesome the great Twilight Sparkle is! I need you to tell me!”

Twilight’s head was swimming. Protests rose to the surface only to be obscured just as quick by a lust-laden fog. Her mental walls were impressive, but even they couldn’t long withstand the rising tide... towering over her like a skyscraper...

Rainbow watched the speck below her, a purple blip amidst the sandy beach. “Well?”

It felt like Twilight was on the edge of a cliff. For so long she’d steered clear of this, afraid of what’d happen if she jumped...

“H-Hello, my name’s Twilight Sparkle!” she said. “I was born and raised in Canterlot, but I moved to Ponyville to continue my studies. I’m the Princess of Friendship and I’d like to talk to you about who I, uh… I’m not doing it right, am I.”

Rainbow looked like she was caught between giggling and groaning.

“This isn’t an essay.” Rainbow spread her mammoth wings wide. “You don’t do that when you meet new ponies, do you?”

A fresh shiver raced up Twilight’s spine, but this one was different. “O-Okay, um… a little about me. I-I graduated from CSGU summa cum laude as valedictorian. I was the first student to hatch the dragon egg used as an entrance exam for the school, and also the youngest pony ever to be tutored by Princess Celestia. I saved Princess Luna from corruption and reawakened the Elements of Harmony—”

“You sound like you’re reading off a checklist,” Rainbow said. “C’mon, aren’t you proud of all those things?”

Twilight blanched. “Of course I am!”

Rainbow blew a raspberry. “Could’ve fooled me.”

Stars alive, that tongue could’ve filled the entire foyer of Canterlot Castle. “Well, I am. I’m very proud of the things I’ve done!”

Rainbow got an odd grin. “Then say you’re the smartest egghead in the world.”

“What?!” Twilight did a double-take. “H-Hey, come on! Intelligence is subjective! A fish will always seem like an idiot if you judge it by how well it can climb a ladder—”

She was cut off by Rainbow snickering. “Fine. How about saying that you’re the smartest when it comes to friendship?”

It was getting harder and harder for Twilight to stay focused. “Uh, well… I s-suppose that’s more accurate, but still not necessarily—”

Rainbow blew a puff of air at Twilight. “Quit with the humble act already.”

“Gah!” Twilight had to put a shield to prevent being pelted with sand. “Okay, yes! I know more about friendship than most ponies!”

At this, she felt the barest hint of a flicker inside her, but it was so minute it was lost amidst the tension.

Rainbow laughed. “Say it like you mean it!”

Horseapples, Twilight’s tail was flagging again. She fidgeted in place and tried to keep her hooves put. “Uh, w-well… it’s not really for me to decide, is it? Nnnngh, other ponies have to be the judge on this kind of thing—”

“Twilight.”

She wilted. “...I’m not sure I can do this.”

Rainbow took a mighty step forward with a deafening THOOM. “I once heard you say that you thought you were ‘nopony special’. Well, like it or not, you’re one of the most special ponies in the world! How about you give yourself credit for a change?”

Twilight had to use her earth pony magic to keep steady amidst the tremors. “I-I...”

“Let’s try again.” Rainbow loomed over Twilight even more now. “Tell me who you are, and this time, I want you to mean it.”

Twilight gulped. Her mind was clouded over, senses saturated in Rainbow Dash. Protests were being replaced by a mire of sticky tar. The back of her throat ached like something was trying to claw out of it, something desperate to break free of its bonds...

“I am Twilight Sparkle,” she said. “I’ve been taught by the best of the best all my life, and I know for a fact that they’re all proud of me! I’ve done amazing things thanks to the things I’ve been taught, and my friends and I deserve all the credit we've gotten.”

Rainbow smiled. That tone was creeping into Twilight’s voice, the one that always held your attention. “Keep going.”

Twilight shuddered from a fresh rivulet running down her leg. “A-All my life I’ve heard what a… what a genius I am, that I was being groomed for the throne. I never paid much attention, but deep down, I saw what Princess Celestia was teaching me, the skills she wanted me to have… Skills I was always the best at.”

Twilight was so focused she didn’t notice the rising tingle in her body. It added to the knot tightening in her belly, goading… encouraging.

“Even before I became an alicorn, I was one of the most powerful ponies of our era.” Her eyes flashed bright, her mane and tail shimmering. “I can control the elements, manipulate matter, even travel through time itself! But now... well, not that I’ve tried or anything, but let’s just say that if either Celestia or Luna wanted a day off, I’m pretty sure I could cover them.”

At this, the whole beach rippled like water. Even Rainbow could feel the air crackle, the giddy magic making her heart beat faster.

“Yes.” A blush spread on Rainbow’s face. “Nnngh, yes… you could...”

The air went back to normal as Twilight quieted her magic, but her whole body was steaming, even more building up. “Pride… that’s where it all comes from, isn’t it? In the end, bragging’s all about your pride.”

Rainbow licked her lips. “And you have every reason to be proud.”

At last, Twilight noticed the tingling. She gasped as the enveloping heat flared from deep within to spread to her limbs, electric and buzzing in the best way. Her point of view slowly rose inch by inch, her growing hooves pushing away the sand. She felt the magic of the spell now working, newfound strength flowed into her to support her size, pooling deep inside her before flowing back into her core...

But it was over far too soon. Twilight was left wanting as the feeling faded to the back of her head. She made a noise between a snarl and a moan before looking back up at Rainbow, who was staring at her, face flushed, expression almost hungry.

“There's my Twi," she said.

Twilight checked herself. She’d guessed she’d grown maybe half a foot or so, putting her just shy of Princess Luna. She poked herself to make sure it was real.

“Wow…” Twilight shivered again. “That's what it feels like?”

Rainbow leaned closer again, her voice soft and low. “You can sorta think of bragging as a fib that isn’t really a fib. Unless you’re tossing shade, which is a little different…” The thought of Twilight smack-talking made Rainbow quiver. “A-Ah, good bragging isn’t full-out lying, it’s just adding a little more to the truth! You don’t wanna say you, um… can do something impossible, but you don’t wanna sell yourself sh-short, either.”

Twilight noticed the slight catch. “You okay?”

“U-Um…” Rainbow wiggled her titanic hips. The idea of Twilight getting that cocky smirk, standing tall as she claimed could do the most ridiculous things, except they were all true… Wrecking ball-sized drops fell from Rainbow’s marehood to splash down onto the beach like bombs, and she flicked her tail with a SNAP that boomed like thunder.

Twilight clapped her hooves over her ears. “Hey, take it easy!”

Rainbow shook her head clear. Growling, she walked off the beach to instead go out into the ankle-deep water (to her, anyway) her crashing steps causing incredible waves that made Twilight have to fly up into the air.

“RAINBOW!” Twilight felt her ire rise. “Would you be a little more careful, please?!”

“Errrrgh…” Rainbow made her way to the cliff face and sat beside the waterfall with a sound like an avalanche. The rockface groaned and shuddered, but otherwise remained intact, her fluffy tail like a colorful dam spread out across the river’s length.

Twilight approached from the air, but stayed a ways off in case of an actual avalanche. “What’s wrong? What’re you doing?”

“C-Cooling off.” Rainbow splayed her hind legs out wide, scooping several swimming pools worth of water to splash on her crotch. “Nnnffff… W-Watching you do that was HOT.”

Twilight blinked like an owl. “What?”

Rainbow blushed and jerked her head away. “E-Erm! Where… where was I? Oh, yeah. Bragging’s all about getting psyched, y’know? You get others psyched by sh-showing what they could be, and yourself psyched by reminding yourself what you are. It f-feels good to look back at all the times you’ve won and be like, ‘Wow, I can’t believe I did that!’ I’m a-awesome!”

Twilight flew a bit closer, now hovering just above Rainbow’s knee. She could feel the heat from Rainbow’s loins, her thick scent stronger than ever. “Rainbow, did you just—”

“You’ve got plenty more to brag about, so go ahead and pick something!” Rainbow shifted, her movements making the cliff crack even more. “Tell me all about the coolness, the awesomeness, the r-radicalness that is—unf—Twilight Sparkle!”

Twilight almost didn’t argue. That deep itch was still there, more insistent from the waterfall’s spray mixed with Rainbow’s warmth and scent. It was a cloying cocktail drenching Twilight from nose to tail, and all she wanted was to fly down to that supersized slit and…

...watching you do that was HOT…

And here was yet another cliff Twilight was on the edge of. Guess her mother wasn’t the only thrill seeker of the family.

“Confidence and belief, pride and power, competing and embellishing… ” Twilight cleared her throat and shouted. “You wanna know all about me? HA! Look at you, all hot and bothered already! Your nerves might short out if I say even a fraction of what I’ve done!”

Twilight felt it creeping up this time—a hyper sensation that thrummed in her ears and spread over her like a blanket. A moan escaped her as she swelled larger, her wingbeats faltering as she ran her hooves over herself.

Rainbow looked on with a shark-like grin. Her spread wings twitched, one of them brushing the waterfall and flicking water far out into the forest. “Y-Yeah?”

“YEAH!” said Twilight. “You've no idea how, erm… awesome I am! I’ve fought gods and spirits and—oh sweet Luna—c-come out on top! I’ve recovered ancient relics and fought d-dragons! I’ve done more—ohyesmore—in the last few years than most do in their whole life!”

Twilight nearly fell out of the air from the repeated bursts, her body lengthening and thickening, her frame reaching greater sizes. She reached Celestia’s size in seconds and kept right on growing, filling more and more space as time passed, now a proper alicorn.

And Rainbow had a front row seat to the show. Her nostrils flared in shallow pants, her hoof now hovering above her flower. “Twiiiiiiii…”

“You th-think you’re so high and mighty—ahhhnnn—just because you’re big?!” Twilight shouted. “You can’t even begin to imagine what I can do! Reality itself is my toy!”

Another brag, another few feet added to her height. This time she did fall out of the air, landing belly-first atop on Rainbow’s knee, groaning long and low.

Rainbow chuckled. She hadn’t even felt Twilight land on her. “I-I saw that spell you used back in town. You know all kinds of s-sexy spells, don’cha?”

Twilight rose to her hooves. She stumbled and swayed back and forth, legs longer and more powerful with every step. “A-Alright, stop!” Twilight’s horn throbbed nearly as much as her groin. “Rainbow! H-Have you been coming onto me this whole time?”

Rainbow waggled her eyebrows. “I’ve cum onto you plenty.”

Twilight’s legs shook. It took her all of two seconds to decide a course of action, the coiled, gnawing tightness just needing a little bit more...

“Y-Yeah, well I’m—” Twilight cut herself off with a moan. “—I’m not s-sure you’d be able to handle me! I may be an egghead, but the s-smartest eggheads apply what they’ve learned! And do you know who I am?!"

Rainbow could actually feel Twilight’s weight now. She was the size of an elephant, but to Rainbow she was nothing but an ant. “Who?”

Twilight threw her head back and screamed. “I'M THE SMARTEST EGGHEAD IN THE WORLD!”

It hit her like a train. Her voice failed her as her muscles went rigid, hips jerking to grind on Rainbow’s knee. Upward and outward Twilight grew, shooting up more and more, synapses firing with every new inch. She surpassed the largest of elephants and started making her way towards house-size, but all she wanted was more… MORE...

Rainbow couldn’t hold back anymore. She bit her lip as the first jolt hooked her in, and the cliff cracked more and more as she pushed her fetlock to her crotch, her juices coating her tail in a steady stream.

Twilight was having to widen her stance more and more, each surge greater than the last, but when it ended she was left wanting again. Normally a peak like that would leave her satisfied and then some, but here...

“S-So you like confident ponies,” Twilight said. “Then let me tell you a little secret, Rainbow—the real reason why I don’t brag about the amazing things I’ve done... is because I never know where to start.”

Rainbow groaned. Her eyes were closed, head tilted back, her fetlock moving with loud SCHLICKS that echoed throughout the basin.

Twilight felt the tingles resurge. For the first time, she inhaled deep and relished the aroma that saturated everything. “And of course I know pleasure magic! Did you forget who my sister-in-law is?! By the time I’m done, your throat will be raw from screaming my name!”

Rainbow arched her back. She rubbed faster, the lewd sounds of slick flesh overtaking the roar of the Falls. She opened one eye and saw the dot of purple was now like a tiny figurine, Twilight’s voice getting louder… stronger...

Twilight got a wicked grin. “But you look like you’re enjoying yourself plenty already.” She looked down at the crevasse that was Rainbow’s cunny. “Does hearing me follow your advice get you going, Rainbow? You better enjoy it now, because pretty soon, I’ll be using my mouth for other things...”

Rainbow sucked in a breath through clenched teeth. Her eyes were fluttering, her legs twitching. She could tell Twilight was growing faster now, already the size of an Ursa Minor. Every brag shrank the gap between them, but the notion excited Rainbow all the more...

Twilight examined Rainbow in a different light. Muscled legs from a lifetime of exertion. Wings that looked chiseled from the very cliff. Wide, padded hips and a toned tummy. Soft skin and a plush, shiny coat. A rapturous face, ruby eyes lowered in a sultry gaze, her colorful mane stuck to her neck and shoulders.

“I hope you taste as good as you look,” Twilight purred. “You won’t want—haaaaa—anypony else after you’ve been with me! You’ll only want the BEST!”

Rainbow’s humongous soaked hoof was moving with heavy WUMPHS that were like an impossible piston. She was gonna peak in the next few seconds regardless, but if she wanted to push it to the next level...

“Always did want... an equal!” said Rainbow.

And her body rumbled, a charge in the air that signalled what was to come. Hot, burning POWER built up like a furnace inside her, hotter and hotter, like a volcano preparing to erupt. It all funnelled into the incredible rush that’d been on a hair trigger...

Twilight felt the rumbling, but she was too caught up in her own sensations to care. Her horn sparked and popped from the continued surges coursing through her.

"More!" Twilight’s eyes rolled into the back of her head. "MORE!"

The cliff cracked as Rainbow’s already colossal form grew. The waters rippled around her swelling rump and hips, and while it looked like she was only gaining inches, in reality she was gaining yards, her head rising higher as she became greater. She jerked up her hips with a shout that was heard for dozens of miles, a deluge of marecum flooding out to replace the river’s waters.

“Bigger!” Rainbow could feel every part of her piling on more mass, from her wings to her hooves to her flanks. And when her hips crashed back down, the force was so great the river exploded in a blast of liquid and stone. “BIGGER!”

The shaking made Twilight fall back to her stomach. Rainbow was outpacing her… outgrowing her! For every foot Twilight gained, Rainbow multiplied it! Rainbow’s fuzzy coat was rising back over Twilight, the hairs creeping around her legs like tall grass! How—

And then Twilight remembered. “The c-counterspell back in town...” She couldn’t help but groan. “Guess I’ll need t-to...”

Except she didn’t remember what she’d cast. Normally she had a memory for these things, but right now… But she had lots of magic, so maybe…

“Gotta...” The magic came freely and readily. She didn’t even think on what she was casting, she just let it rip! “Gotta beat her!”

The spell was pure adrenaline. Twilight felt it pour into her, feeding into the loop and whirling inside like lightning! Every nerve in Twilight’s body fired in a glorious burst, and hot on that burst’s heels was something big, something that built and built like a balloon inflating in her chest...

“Oh...” Twilight’s skin itched. Her whole body quivered, a sensation like she was seeing herself from outside her body. “OH!”

It was like the pleasure so far had been a four or five. But now it was cranking up, going to a six… then a seven… Eight! Nine!

Twilight couldn’t even speak. The sensation wiped her mind clean, her own hoof trailing south to join in Rainbow’s bliss. She felt too small for her skin, but the walls were crumbling more and more. A small part of her made one last desperate attempt to keep the beast inside its cage, but it was far too late.

It happened in spurts. The brimming wellspring would flood into her, and Twilight would GROW like an explosion had gone off inside her. The first put her at sixty feet, but that was hardly a milestone as the second pushed her up two more stories. Twilight was now big enough to stomp a house flat, but she was a newborn puppy to Rainbow, her hooves only barely dangling over the edges of her knee.

And Rainbow was still growing, too. The need had been gathering the entire time she’d coached Twilight, and now she was swift approaching three-quarters the size of the Falls, her head swimming in a lust-drunk haze. Her eyes were locked on Twilight’s as they rode their highs, their faces rosy, mouths silently moving as they became larger... and larger...

Twilight gripped Rainbow’s knee and thrust. “The things I’m gonna to do to you...”

That one made Rainbow squirm. She was already picturing it, spurred on by Twilight’s bedroom eyes. “Gotta... c-catch up to me first.”

“Oh, I’ll catch you.” Twilight slid down Rainbow’s leg to fall into the leg-deep water and cause a tidal wave. “And then I’m gonna take you! You’re MINE, Rainbow Dash!”

The ground shook… actually shook with the force of Twilight’s weight. The water churned around them, more and more rocks falling from the tall cliff. The beach was long washed away now, many of the nearest trees starting to topple.

Rainbow chuckled, her scratchy voice echoing throughout the Basin. “Prove it.”

Twilight sized up her quarry. Rainbow was seven times larger than her—a veritable mountain of a mare. Nothing a genius magical prodigy and seasoned heroine couldn’t handle.

She moved towards Rainbow in a lazy stride. “You want me to do it fast? Or you in the mood for something slow? Doesn’t matter to me—the result will be the same...”

Rainbow couldn’t hold back her whimper. Her afterglow wasn’t even gone yet, and she was already feeling that tightness again. “Ho-ly Celestia…”

Twilight tut-tutted. “Wrong princess.”

Those eyes… that tone! Rainbow started going at it again even as her back tickled from the rock crumbling around still-growing form. Her flanks now took up the river’s width and then some, her outstretched legs bulldozing an entire acre of forest and still swelling BIGGER...

“You didn’t answer me.” Twilight brushed her wing across Rainbow’s cutie mark—a symbol the size of a crop circle. “Fast? Or slow?”

Rainbow went rigid at Twilight’s touch. “T-TWILIGHT!”

Twilight snickered. “What? You think I haven’t researched certain customs since getting wings?”

Rainbow’s hooves dug into the ground. She was panting, her soaked hoof already a blur. “S-Slow! Go SLOW!”

Twilight only barely kept her voice level as her growing wing covered more and more of Rainbow’s flank. “The great Rainbow Dash, wanting something slow for a change? My, my. Do you want to savor what’s about to happen? Or maybe... do you want to savor me?”

Every word was fuel to the flames. Rainbow couldn’t have stopped even if she wanted, her thighs clenching hard and fast. Twilight was getting easier and easier to see, almost as if she were rising up into the air…

Twilight planted kiss after kiss on Rainbow’s cutie mark, her lips like a cloud along Rainbow’s soft coat. “I hope you know what you’re in for. If knowledge is power, I’m the queen of the world! You can’t even—nnngh—imagine the things I know...”

Rainbow was sweating. Her hoof was on autopilot as she teased herself, falling into a rhythm that never failed to please. Her attention was glued to Twilight, watching as she went from newborn puppy-size to doll size in mere seconds.

“For example.” Twilight’s buzzing horn glowed. “Did you know there’s particular group of flight muscles that become sensitive when a pegasus i-is... aaaaa—aroused? Doubly so if they’re a strong f-flier...”

Rainbow felt a deliciously hot pressure between her shoulder blades, kneading and squeezing exactly where she’d been grinding against the cliff...

Her squeal hit a new octave. Her pinned tail thrashed and smashed the river with wet SMACKS that sent water flying over a thousand feet into the air. Rainbow abandoned all thoughts of teasing and went straight to for the finish, her growing hoof the size of a water tower.

Twilight savored the reaction like a fine wine. She took a deep breath and closed her eyes, and when she opened them, she was thirty feet taller. “Speaking of sensitive spots, there’s a certain sssssomething I noticed about you at the spa a few months back…”

Rainbow felt her rear horseshoes being pulled off, landing in the forest with an impossible CRASH! She had a split second to react before her hooves were enveloped in that same hot pressure, stroking and massaging…

“AHHHHH!” Rainbow kicked and bucked. The ground heaved as trees of all sizes went flying, her legs scraping the area like glaciers right down to the rock. Her labia was winking, aching for need and release, but all it did was make the knot in her belly tighter...

“Mmm...” Twilight nipped the edge of Rainbow’s hip. She felt cramped, filled with an enveloping energy flowing through her. “No wonder you didn’t want—ngaaaa—anypony touching your hooves!”

Rainbow could hardly breathe. She could feel the newest peak threatening to crash into her, and she wanted nothing more than to embrace it. She smashed her head into the rock and made it shatter like thin ice, her hips thrusting, the power inside her swelling more with every second.

“And if we’re talking—mmmmf—MAGICAL power, then hoooooo boy, you picked a winner!” Twilight reared, her hooves teasing the bottom of Rainbow’s ribs. She thrust against Rainbow’s flank, trailing kisses up Rainbow’s side as she grew. “I’m the most gifted ssss-student Princess Celestia’s ever had! It didn’t matter what kind of challenge—YES—she threw at me! I always… ALWAYS beat it!”

Rainbow didn’t care that Twilight was growing faster than her. She herself was taking up the entirety of the river’s mouth, the gigantic waterfall crashing down onto her shoulder. Untold gallons were cascading down her front to pool in the gaps between her abs. She was moaning, eyes on Twilight, her motions jerky and tense.

“Maybe I’ll sh-show you my true power.” Twilight stared up at Rainbow, their gazes smoldering. “But I’ll warn you, Dashie… if you like strong ponies, you might get obsessed!”

Rainbow bit her lip so hard it nearly bled. Her need was as big as the rest of her, her core a compressed spring. Her growth stopped at just shy of eight hundred feet, but Twilight was still closing the gap between them...

“But you wanna... kn-know the best part?” Twilight punctuated her words with wet licks. “Even though I’m brilliant… even though I’m an alicorn… even though I’m a living legend… my legend… keeps... GROWING—”

BOOM!

One second Twilight was talking, the next she was grabbed—no, glomped to the ground with the force of an earthquake. Rainbow pulled Twilight into a desperate kiss, Rainbow’s lips dominating Twilight’s along with most of her muzzle. Now it was Twilight’s turn to squeal, Rainbow’s need sparking a sympathetic fire that made her only want MORE. She was half Rainbow’s size and rising steadily, able to kiss back more and more by the second, already able to wrap her hooves around Rainbow’s head and keep her trapped, but it wasn’t enough, not nearly enough...

Rainbow groaned as she felt Twilight’s grip strengthen, pulling her down into a proper lover’s embrace, just as frantic and so very sure. Twilight’s magic was flaring, the energy so powerful it lifted stone and water to hover in the air around them. Rainbow’s own magic responded in kind, clouds gathering above them and wind picking up. The river bottom cracked beneath Twilight’s still-increasing mass, whirlpools and rapids raging around them and adding to the chaos.

Twilight thrust up her hips, her crotch just shy of Rainbow’s underbelly. She was even bigger on the second thrust, and her soaked nethers touched Rainbow’s stomach before sliding south. Rainbow thrust back immediately, and before long their multi-million ton bodies were entwined in a titanic sexy dance.

They were bigger than castles yet the urge was just as fierce as ever. Rainbow broke their kiss and dove right back in for a second, then a third, then a fourth and a fifth. Their kisses rolled one after the other, their lips like magnets. Each new growth spurt pushed Twilight on, fueled by sensations she now readily embraced, insatiable and burning hot, hot, HOT! And the size difference between them just kept dwindling—seventy feet… fifty feet… twenty… a yard...

It was when Twilight wrapped her legs around Rainbow’s rump that they noticed. Rainbow pulled back with a wet POP, rosy-faced and nostrils flaring, nickering low as she took in the mare of equal size beneath her.

“Quick study...”

Twilight wrapped together their tails and tugged. “Good teacher.”

“Mmmmf…” Rainbow gripped her harder. “I knew I shoulda gone for you sooner.”

Twilight could feel her butt pressed up against the cliff, her sheer weight crushing the rock to rubble. “Think you can handle—ahhhnn—a princess?”

Rainbow growled. She swooped back down for a fresh kiss, their lips moving with smacks louder than cannonfire. Their tongues were mingling, frenzied and desperate, Rainbow intoxicated by the taste. She was so enamored that she didn’t notice how Twilight’s lips were starting to envelop hers, how Twilight’s tail was lengthening, or how the sounds of cracking rock and heaving stone were increasing.

But Twilight noticed. She pulled Rainbow down harder and thrust again, each one pushing a little more into Rainbow’s goliath weight. The tinglings had never stopped, running on a backlog that seemed endless… until there wasn’t any more room between their bodies anymore. But it didn’t stop there. Twilight’s body kept swelling, expanding, growing more and more until she was lifting Rainbow’s immense hooves off the ground!

“!!!” Rainbow pulled away. Her wings fluttered with the strength of tornadoes, but Twilight held her tight. She yanked Rainbow back into their liplock, growling and gripping her captive even as she continued to grow. The Basin was swiftly becoming more purple than blue as the seconds passed, Twilight consumed by a fire that could only be quenched by Rainbow Dash.

But that only served to fan Rainbow’s fire. She moaned just as loud and got rougher, the two of them pushing back and forth, their hooves wandering and groping. Rainbow sucked on Twilight’s lower lip in between breaths for air, their soft gasps and pants only making her needier, their exhales pushing into each other’s mouths. The cliff behind them was crumbling, the waterfall splitting into multiple new paths that split even further as more cracks formed.

Twilight clutched Rainbow and shifted. Building-sized stones heaved and levitated up into the air as they rolled, Twilight’s sparkling horn a monolith that crackled with rising power. The river and forest was levelled with impossible noise under the moving mass of moaning mares, Twilight maneuvering on top of Rainbow, laying on her like a smothering blanket.

That was when Rainbow peaked. She squeaked and kicked mightily, exploding the cliff in a shower of dust and of gargantuan rocks that flew all around them. Her pegasus magic went wild, the clouds above them forming into an incredible thunderhead. Rain was soon pouring down in heavy sheets, but it felt barely like a sprinkle to them.

Twilight’s growth finally slowed. She broke their kiss right as Rainbow came down and nibbled her jawline, now a head or so taller than her.

“Gotcha,” Twilight whispered.

Rainbow purred like a sleepy kitten. She stroked Twilight with her hooves and wings, the latter lingering on Twilight’s cutie marks.

“You know what it’s like, don’t you?” said Twilight. “To be in a league of your own. To be something nopony’s ever seen before.”

Rainbow nodded. She nuzzled Twilight, a dull murr escaping the depths of her throat.

“Why’d I never realize it?” Twilight said. “Mmmmm, you’re somepony who knows how—nnnggh—lonely it is at the top. A fellow paragon...”

Rainbow could feel Twilight’s growth picking back up. Now she was really starting to dwarf her, her world becoming purple and pink and indigo. “You and your egghead words...”

Twilight moved up to kiss Rainbow’s shrinking ear. “The best of the best. The one who ssssssets the bar. THE model of excellence—or better, awesomenesssssss…”

Rainbow was pressed deeper and deeper down by Twilight’s colossal weight. She could feel the stone caving, the river rushing down into a new waterfall. “S-Sounds like me…”

Now Rainbow’s body shook like an engine revving up. Gradually the gap between them began to shrink, Rainbow easily, almost lazily catching up to Twilight’s size. Acre after acre of forest was conquered by a confidence that knew no bounds, and yet Rainbow knew she was nothing to what she knew she could be—WOULD be!

Twilight chuckled. She could feel her growing magic empowering the original spell she’d cast, pouring into Rainbow like liquid through a siphon. “Hmm, what to do to you? So many possibilities, so little time… Oh, I know! An old favorite, but even kinkier like this...”

She nuzzled Rainbow one last time before her kisses began trailing lower. She kissed the hollow of Rainbow’s neck, her stadium-sized tongue sneaking out to taste Rainbow’s salty skin. Rainbow’s breath caught in her throat as Twilight kept moving farther south, first kissing her chest… then her belly… then her—

“GUH!” Rainbow went rigid when she felt Twilight’s breath there, but Twilight skipped the prize and kept going down, her kisses trailing yet farther south to pepper Rainbow’s thighs. Rainbow looked up to see Twilight’s head pulling back farther, her fluted horn pointed straight at her like a towering spire. Rainbow was about to say something, but then she felt the JOLT of that hard and buzzing spire graze her canyon-sized marehood—

Twilight’s horn slid in.

Rainbow’s howl was heard in four cities. She squeezed down on reflex, her inner muscles pulling Twilight in deep, the crackling magic stimulating every nerve inside. Now the magic really was pouring into her… but it also started to loop, the two spells building off one another!

Twilight nearly came right and then and there. Warmth and wetness now enveloped her in a rippling massage, a whole city’s worth of magic flowing out and even more flowing back in. The now-greater magic would then circuit back out of Twilight and into Rainbow, only to turn right back around even stronger...

“Unnngh…” Twilight pushed in deeper. “I wonder… if you can take… A-ALL of me? Or maybe I’ll be too BIG...”

Rainbow gasped. Twilight’s horn was already a leviathan, and she could feel it suddenly getting longer… thicker!

“I-I can taAAaAkE—” Rainbow sucked in a raspy breath. “ANnNYYYyTHINg!”

Rainbow shot up fast to close the distance between them, needy and desperate for MORE! Not only was her growth fueled not only by her own boast, but the fresh magic pumping straight into her system! Within seconds she overtook Twilight, the two of them approaching two thousand feet tall!

Soft. Wet. Tight. Those were the only things Twilight registered. She didn’t cared that a single hoof was larger than the entire beach she’d been on, or that her tail alone was longer than the now-destroyed Prideful Falls. She rocked into her thrusts, moaning even as she felt Rainbow swelling with each one. The familiar smell of Rainbow’s need became stronger again, overpowering and cloying and tantalizing as Rainbow’s legs rose all around her...

Twilight opened her VAST reserves of magic and hornfucked Rainbow like a mare possessed. The raw power of an alicorn surged forth to push Rainbow larger… and larger… and LARGER… surpassing even the Basin itself!

“Y-YES!” Rainbow was a goddess. Her body was tingling and buzzing, growing so fast that the clouds were rushing up to meet her. “BIGGER!”

Twilight was laughing mad now. She was a puppy again to Rainbow, but only because the magic hadn’t finished a full circuit. It came back around with Rainbow’s added energy to pump into Twilight like a balloon being filled from a tank...

And Twilight rumbled.

Her laugh became a lewd shout. Peak after peak hit her, growing in leaps and bounds that’d never been seen before, nor since. With every hundred feet claimed she pushed that much deeper into Rainbow, soon matching her absurd size… then SURPASSING it, becoming twice Rainbow’s size… then thrice... stuffing her to the brim!

But that wound up being Twilight’s limit. The overload hit her mind like a ton of bricks and blanked her, going limp and still as a ragdoll with a FWUMPH. The floating rocks and water crashed around the two titans with ear-shattering BOOMS like meteorites falling, and at last, all was silent.

That is, save for the freak thunderstorm. The weather still raged on in a deluge of rain and sleet, the ruined Basin soon flooded with freezing water. But Rainbow and Twilight’s colossal bodies heated the area to form a mighty fog that obscured everything around.

It was a moment before Rainbow came off her own rush to realize Twilight’s magic had stopped, then another to realize Twilight herself was in la-la land. Rainbow sat up and brushed the clouds out of her face.

“Hey.” She nudged the behemoth between her legs. “Starswirl Junior.”

Twilight murmured something about the square root of pi.

Rainbow rolled her eyes. She pulled herself off of Twilight’s horn with a SCHLICK. “C’mon, up and at ‘em.”

Twilight stirred. “Huzbgh...”

Rainbow could feel the sheer weight and power behind her every movement, how slow everything seemed at this size. Muscles the size of city blocks bristled with strength to move her god-like frame. She could encompass all of Ponyville with her wingspan and then some. She wasn’t exactly sure how big they were, but something told her she could use a small mountain as a dildo if she wanted.

And hey, if they weren’t quite that big yet…

“So I’m not really sure how sensitive horns are,” said Rainbow. “But I’m gonna guess that felt reallllly good.”

Twilight didn’t answer right away. She was still processing that the multicolor carpet she was staring at was actually a stretch of land bigger than Sweet Apple Acres.

“...I think I should figure out that counterspell,” came her muffled voice.

“Eh, give it a bit.” Rainbow got up, marvelling how high her vantage point was now. And yet she was practically a foal compared to two-and-a half-mile-tall Twilight, who was like a living landmass. “Let the lesson sink in.”

Twilight’s voice was like a storm in and of itself. “Yeah… I suppose.”

With earthquaking steps, Rainbow moved over to sit down beside Twilight. She had Twilight stretch out her wing so she could preen her. “You more loosened up now?”

Twilight... hesitated. Her thoughts turned to that quiet sliver of fear, that insecurity that never truly went away. It didn’t have a stranglehold on her anymore, but….

“You might need to give me regular reminders.” Twilight glanced around them and cringed. “Preferably less destructive ones.”

Rainbow giggled. “All that magic and you can’t fix this little mess? And here I thought Twilight Sparkle could do anything!”

“Of course I can fix it!” said Twilight. “At the rate my magic’s been scaling, I could restore a tract of land ten times this size—”

Twilight rumbled again.

“O-Oh geez.” Her wings stiffened as she grew again, larger… greater… stronger. The three mile mark was approaching fast. “I sh-should probably stop talking...”

Rainbow licked her lips. She was being greatly outsized by Twilight again, but that just meant there was more beautiful mare to ravish. “I could listen to you brag all day.”

Twilight gulped. “M-Maybe some other time. The Crystal Mirror links to infinite alternate dimensions, so maybe we can find a barren world or something.”

“Oooh, kinky.”

Twilight looked down at Rainbow, now little more than a plush toy. “So, you really wanna give us a shot?”

Rainbow raised an eyebrow. “I don’t give things a shot, Twi. No matter what it is, I give it my all.”

Twilight shivered. Those fiery eyes drilling into her, never once looking away... “I’m gonna have a hard time saying no to you, aren’t I?”

“More like you’ll have a hard time making excuses.”

Twilight laughed as she felt Rainbow rumbling. She looked off into the fog, thoughts turning to counterspells as Rainbow broke a mile beside her. “I’ll have to hold you to that.”