Today was another day for testing magic.

In the privacy of her apartment, Sunset tightly held her geode necklace in her right hand and focused on casting one of the many Equestrian unicorn spells she learned back in her home world of Equestria. Her other attempts at learning about the magic of the human world ended in many, many, MANY painful failures. She, however, now had a magical geode capable of harnessing that unpredictable magic. Her magic may have manifested as a power to see into other’s memories through physical contact but with experimentation, she hoped to bring out all the variety Equestrian Unicorn spells brings and with it, help her and her friends deal with whatever threat comes.

Sunset lifted her left hand and tried casting a simple light spell. A familiar aura of blue appeared around her left hand. A smile spread across her face.

“Is it actually working?”

She waited for a ball of light to appear out of the palm of her hand but nothing. The familiar aura of magic being casted was there. No ball of light was appearing though.

A sigh left Sunset’s mouth. “Looks like today’s experiment is a fai-OHHHH”

A strange feeling of pleasure shocked Sunset. An unseemly moan escaped her mouth as her eyes rolled back. She almost blacked out but remained conscious to see her left arm begin to change.

Starting from the forearm and moving up to her shoulder, Sunset’s muscles expanded outwards like an explosion went off. Her sleeve was torn to shreds as her bicep grew larger than her head while her left deltoid nearly matched it in size. Sunset lifted her enormous arm, her reaction to the sight of her unevenly large arm being a combination of confusion and pleasure.

“D-Did I somehow use Applejack’s magic? That would explain the sudden muscle growth but not why…”

The blue magical aura then appeared on her right arm.

Another burst of pleasure accompanied the explosive growth of Sunset’s right arm. Moans echoed throughout the apartment as the young woman’s right arm and shoulder grew to match her left. The magical aura quickly enveloped the rest of her torso. Sunset bit her lip, her pectoral muscles ballooning in front of her and tearing right through her shirt and bra. Her jacket and what was left of her shirt was shredded by her back and traps growth. All of her clothes above her waist was nothing more than scraps hanging off her skirt, leaving Sunset topless and allowing her to see the jaw-dropping sight of her upper body.

“THIS FEELS SO GOOD!!!” Sunset moaned, her head surrounded by her pecs and traps.

She felt her abs popping out one by one until she had an impressive eight-pack. Her lower body’s muscles grew but not to the same extent as her upper body, leaving Sunset incredibly top-heavy in appearance. She, however, didn’t mind as her top-heavy appearance took second place to the immense pleasure she was feeling as she grew into an enormous mass of bulging muscles.

This was one magic experiment failure she was enjoying.

By the time Sunset regained her composure, she had stopped growing and with it, stopped feeling the pleasure that accompanied it. She was a hulking top-heavy tower of bulging muscles that almost filled up her entire apartment. One flex of her biceps and the already car-sized muscles would expand even further and possibly break quite a few things.

While she found it comfortable laying her chin in between her pecs with her traps sandwiching her head, she did wish they didn’t block her sight. How was she supposed to admire the size of her bulging muscles if they were so big, she couldn’t see past them? She had to satisfy herself by looking at her colossal arms instead.

The magic experiment may have failed to produce the results she wanted but Sunset was more than satisfied with the unexpected results she got.

After she learned how to shrink herself down enough to fit through the door, Sunset was definitely going to show off her new spell to her friends. And then teach all six of them how to grow muscles like hers…
…

Art by Pictair and colors and lineart by moi. Hope you like this and the short story I wrote for it.