Go on, theres no need to be bashful, Rarity said as she turned around completely and started to strut her way down the narrow path, and, with the spotlight following her, her dress continued to sparkle as her hips sashayed from one side to the other hypnotically and her melon-sized breasts bounced about pendulously. It can be anything at all, the one thing that you wish for more than anything else. It could be something simple such as knowledge, or prowess, or beauty I imagine thats something all of you place at least some value in or it could be something grander, like, oh, reigning over all of Equestria! Any of that could be in my power to grant you! Hmm, whats that? She cupped a hand to one of her ears as she heard a voice responding to her, and her grin grew even broader. Youd like to have me, hmm? she said with a chuckle that reverberated within her chest, Cute, darling, but Im afraid thats one thing I cant just give away, I dont think any of you here are quite capable of handling me. I could gladly, however, accept you into my own thrall.
She blinked her eyelids one more time, and they reopened to reveal they had changed to a solid icy blue with narrowed pupils, glittering like diamonds. The spotlight flickered suddenly before blacking out completely for a few seconds, and when it returned it was now with a deep purple glow, but the momentary darkness seemed to have latched onto Rarity, as her pristine white fur was now tinged black, spreading across her skin like plumes of smoke until her entire body was as dark as the night sky, and her cutie mark transformed, the three blue gemstones warping into a trio of stars and surrounded by smaller twinkling lights like a constellation. We ponies are always so afraid of the dark, she continued whilst reaching up to her head and running her slender fingers through her mane, and as she did so the purple hair seemed to stretch and contort like taffy, reaching double its original length as I cascaded down her back and over her chest, a white streak mixing into its composition along with countless white pinpricks like stars, and her horn extended as it thrummed with arcane energy, a brilliant blue aura surrounded with diamond lights, we are never willing to accept those things which are unknown to us. Well, I have transcended the limitations of most mortal ponies and made the darkness my own to command and control. It was hardly an easy task though, and in the end I found that my physical form wasnt quite enough to contain so much raw magic, but there are always adjustments that can be made.
It may have just been a trick of the light, but an attentive eye would have been able to notice, as the unicorn continued her swaggering gait, her breasts seemed to bob and sway just a little more with every step she took, the ponderous globes growing bigger and rounder by the second. Her thighs similarly pushed out further to the sides, swaddled in layers of flab that sagged downward under their own bulk, and even as they became so large that they squeezed against each other whenever they pushed forward she still moved with precise grace and beauty. Between the two thickening hourglass curves, her previously flat abdomen bulged outward, starting merely as a sagging paunch before developing into a full-blown gut that rolled over her waist like an apron, obscuring her crotch and reaching halfway down her lap. Her dress strained to accommodate her swelling mass, but it only took a thought for her to concentrate her magic enough on the taut blue cloth for their elasticity to drastically increase, gaining enough additional surface area to cover her expanded curves, while at the same time their hue changed from pale blue to a dark amethyst color just like the light that shone upon her.
There is nothing to fear about the darkness, she said with a leering grin, even as the corners of her mouth creased further into her puffy cheeks, and she spread her arms wide, the limbs covered in wobbling sleeves of lard, it can be quite welcoming, as a matter of fact, should you choose to accept its gifts. Now reaching the end of the runway, her legs trembled tumultuously like living molds of gelatin, each swollen column as thick around as a tree stump, buttocks the size of beanbag chairs jutting out behind her in a shelf that hung over her thighs, which in turn weighed upon her calves and shanks, down to her hooves as they stamped against the floor with the force of her immense weight. Her belly swelled outward in an enormous dome of flesh, creases etched across its surface where the flesh rolled over itself, thick lovehandles lining her sides, her navel having expanded into a deep crevasse at the very center of her stomach. Her midsection was almost entirely hidden, however, beneath the absolutely immense bulk of her chest, a pair of gargantuan globes each so large that one of them could have completely crushed a fully grown stallion beneath their mass, so large that they practically eclipsed the rest of her figure, reaching down far beyond the lowest reaches of her stomach, her knees, and nearly to the ground.
But then, theres nothing wrong if you choose not to accept the generosity of the dark, Nightmare Rarity said as she turned around again to begin sauntering back the way she had come, only looking back to give the same mischievous glance she had given at the start of her walk, it only means you dont yet know how to comprehend the true form of its brilliance.
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My inner hype over Nightmare Rarity was building up more and more and eventually I just had to get a pic of her in my usual body shape preference commissioned, and it just so happens that clock-face clock-face is especially adept at drawing ludicrously uber-boobed ponies. I have other more in-depth plans related to the new queen of nightmares, but I also wanted to be able to write something shorter like this just for the sake of showing her off. It also just so happened that yesterday I started reading another fanfic about Nightmare Rarity that probably contributed a few ideas to this. I prefer to imagine that Nightmare Rarity would eventually become a more benign kind of dark side to Rarity, not necessarily evil but more forceful and promiscuous about her “generosity”. And also much bigger.
My Little Pony is owned by Hasbro.
Be sure to look at the original submission too!