This piece was commissioned by one . They requested an image of Equestria Girl Diamond Tiara putting on a few pounds and going full alicorn. They also requested the following story in association with the image:

The Canterlot High prom was swiftly approaching, and Diamond was fuming. All of Diamond’s peers had been showing off their prom outfits to great effect. Much as Diamond was loath to admit it, they all filled out their dresses like champs. Even Silver Spoon was rocking her gown with pride and a healthy degree of bounciness. It was the first time Diamond ever felt small, and she couldn’t stand it. Not one to shy away from a challenge, a quick whining session with her father gave Diamond an opportunity to even the odds. She was handed a device that would make her the bell of the ball, the most majestic and beautiful creature that would put the proportions of her peers to shame.

With the press of a button, Diamond’s body began to change. Though at first she was concerned that her top might tear, she quickly realized that her outfit was transforming alongside her body. As her bust inflated far beyond that of her classmates, the greedy heiress continued to let the transformation continue. She wasn’t satisfied with simply looking the best. She wanted to put them all to shame. Further she grew, both taller and fatter, muscle and mass compounding onto her form by the second. Her simple skirt ballooned out to a full ballgown. Her top changed shape to emphasize her cleavage, and before long her very skeletal structure morphed until she was no longer even human. With beautiful wings on her back and a majestic horn protruding from her forehead, she was no longer a creature anyone could ignore. Diamond was certainly the most majestic creature at the Canterlot High prom. And she certainly was never jealous of her friends or anything.