Maretropolis City 12:00 A.M.

*Click*

The light from a nightguard's flashlight switched on, illuminating the dark lobby of the Maretropolis National History Museum.

"Alright, first day on the job. Let's try not to have a repeat of last week." A stallion mumbled to himself, about to begin his first set of rounds

Shattered Mirror wasn't the luckiest stallion in Equestria, especially when it came to keeping up jobs. During his last job as a night guard for a research facility downtown, he had managed to accidentally set loose a gigantic magical squid monster into the city.

Thankfully, the Power Ponies had been able to stop the monster, though not without some...tentacle action. Unsurprisingly, he was promptly fired, though thankfully not fully blamed for the event. In the aftermath of the incident, it was discovered that the huge tank that once held the monster had been in pretty bad shape due to poor maintenance. Just leaning against the glass had been all it took...

After that, Shattered had been trying desperately to find himself a new job, but despite not being at fault for the accident, word had gotten around about his role in the monster's escape, and no-one was hiring. He had been just about to give up and consider his other options when, by some miracle, the Maretropolis History Museum accepted his application. Hopefully, he could keep it this time.

'Maretropolis may be the greatest and most beautiful city in all of Equestria, but it certainly isn't the cheapest...'

A few minutes into his patrol and he had already begun to feel... uneasy, almost like he was being watched. The exhibit displays in each room weren't helping either. A towering dinosaur skeleton barring its sharp teeth, a likely haunted suit of armor holding a rusty sword, and a creepy painting of a mare that seemed to be glaring at him from the end of a hallway. All of it was sending cold shivers up his spine.

"This is going to be a very long night, isn't it?" He groaned.

*Clunk!*

The sound of something metal clattering to the floor close behind him nearly caused the stallion to jump out of his skin. Whirling around, he pointed his flashlight in the direction of the sound. It had come from the room he just left, the 'Ancient Pony Weapons Exhibit.'

Gulping audibly, he peeked his head partially through the doorway to the exhibit and quickly scanned the room with his flashlight, searching for any signs of movement. The room was packed with large glass cases and cabinets, many of which contained tribal clubs, medieval swords, combat armor, and other old pony weaponry. In the very center of the room was a marble pedestal, topped with a small glass case. What lay inside was the centerpiece of the whole exhibit. The small glass box contained a very recent addition to the museum—a single, very odd-looking knife.

"H-hello? I-is someone out there? Show yourself!" He demanded, trying to sound intimidating, but ending up sounding more scared than anything.

'Oh, please be nothing, please be nothing.' He mentally chanted to himself, getting more flashbacks from previous jobs.

After what felt like an eon of long-drawn-out silence, Shattered let out a relieved sigh.

'Gah, it was probably just my paranoid brain playing tricks on me...'

He shined his flashlight back around the room one last time but still failed to see anything amiss. Turnin back around, he left the room, bound for the rest of his patrol route, though he did take the occasional glance or two over his shoulder...

As the guard pony's footsteps slowly faded away, Scarlet-colored eyes appeared in the vent, right above where the stallion had been previously standing.

"Huh, that... went a whole lot better than I expected it to." A unicorn mare mumbled to herself from within the vent, holding a metal screwdriver which she had accidentally dropped.

"You need to be more careful, Mirror!" The mare named Mirror scolded herself. 'I don't need another screwup like the research labs! At least that giant squid monster had been a pretty good distraction.'

Mirror Glance had on her full-body, zip-up black catsuit with a utility belt fastened tightly around her narrow waist. To conceal her identity, she wore a black mask over her eyes while both her dark brown mane and tail had both been cut to only a few inches each, preventing them from getting in the way as she did her jobs. Saddled with two reasonably large melon-sized breasts and a curvy ass, it was hard enough crawling through the vents already.

Being a cat burglar by trade, most would probably think that having Mirror's rather generous feminine features would end up being more harmful than good. Often, however, she found them to be a far more valuable asset than most might assume, especially on the rare occasions where she got caught in the act.

Pushing away some humorous memories from her mind, Mirror refocused her attention to the task at hand.

'I'd better gets this done quickly, my client wanted this artifact delivered as soon as possible, and that guard could decide to come back at any time.'

Using her recovered screwdriver, Mirror finished detaching the vent's filter and stowed the screwdriver back into her utility belt, ensuring that it was secure this time. She then levitated the vent cover up and back inside the shaft before she slipped silently from the vent and down into the room below. Using her magic, Mirror quickly caught herself just before hitting the ground, her breasts bouncing from the sudden stop. Quickly and quietly, she snuck over to the center display and inspected her target.

The Desperation Dagger....

Her client had requested that the ancient dagger be acquired from the museum, allegedly believing it to be secretly enchanted. She didn't know exactly why they wanted it or what it even did, but with how many bits they were willing to pay, Mirror didn't ask those kinds of questions.

Inspecting the glass case, she noticed a miniature pressure sensor in the far corner. It would likely sound an alarm should she lift the glass off the pedestal. Mirror closed her eyes and concentrated magical energy into her horn, casting one of her favorite spells. Suddenly, her right hand began to shift and change, becoming partially transparent. The effect spread about halfway up her forearm before stopping just below her elbow. With the spell cast successfully, Mirror opened her eyes and inspected her arm for any imperfections.

With a confident smile, Mirror reached out towards the case and smirked as her hand passed cleanly through the glass. She quickly grabbed onto the hilt of the dagger, and with another surge of magic, it too became transparent, allowing her to pull it back through with ease.

Not wanting to use up too much more of her magical reserves, Mirror ended the spell and inspected her prize. It appeared to be made from bone, yet it felt like heavy metal. Perhaps that was the enchantment that her client was after? There was also a tiny image carved into the knife's handle, a golden waterfall. The blade felt oddly warm in her hand as it began to glow very faintly. After a few moments, however, the glow subsided, and she attached it to her belt.

'Hopefully, this thing doesn't draw any attention. Now, it's about time I got out of here before.'

"Hey! S-stop right there!" A shaky voice suddenly shouted behind her, her body illuminated by the beam of a flashlight pointed at her backside.

'Horseapples...well, time to see if I've still got it...'

The Masked Matter-Horn stood proudly atop a tall building overlooking the surrounding city blocks of Maretropolis. She watched and listened carefully for any potential signs of trouble or commotion, ready and willing to take on whatever the city had to throw at her. Though, if she was honest, she was kind of hoping that nothing major happened at all. She wouldn't have the rest of the team to back her up tonight.

Due to a recent surge in crime rates across various areas in Maretropolis City, the Power Ponies had been forced to split up to deal with the rising crime rate more effectively. This, unfortunately, also meant that police's resources were stretched thin as well, meaning slow response times and not much in the way of backup. So far, it had been a reasonably quiet night, with not so much as a purse bandit running amuck. No guarantee that that would hold forever, though.

The Masked Matter-Horn was wearing her iconic crime-fighting outfit: A light purple spandex bodysuit and her signature light-blue magic-resistant plates. To conceal her identity, she wore a set of gold-plated goggles over her eyes. Though the suit did well to emphasize her fairly attractive physique, she was nowhere near as busty as most of her colleagues. Due to just how skin-tight her suit was, it clutched to her every curve and crevice, leaving very little to the average onlooker's imagination. Even her marehood was left partially visible, tucked away between her muscular thighs ahead of a particularly puffy anus. She didn't mind the lecherous stares the suit regularly earned her, though, and it wasn't like anypony knew who she really was anyway.

Yet as she began to ponder such occasions, The Masked Matter-Horn was suddenly ripped from her thoughts by a high-pitched buzzing sound. A building alarm was going off nearby! She immediately recognized the alarm's signature tune as well.

'The Natural History Museum!'

Springing into action, the superheroine leaped from the rooftop, levitating herself through the air as she b-lined for the museum. It didn't take long for her to get there, and upon reaching the roof of the building opposite the museum, she arrived just in time to see the building's front doors burst open. A rather busty-looking, catsuit-wearing mare sprinted out and down the steps, a cloud of smoke flooding out through the museum's doors.

'A thief!'

The cat burglar sprinted down the sidewalk, darting past a confused pedestrian before finally darting down into an alleyway. Moments later, an oddly familiar-looking nightguard came running out of the museum, looking more than a little flustered, his cheeks bright red as he worked to fasten his belt.

Matter-Horn lifted herself above the alleyway and quickly gave chase. The mare had likely stolen some priceless historical artifact from the museum and planned to sell it to some infamous crime lord for Celestia knows how many bits.

'Not in my town you don't! '

As she continued running down the dark alley, Mirror Glance reached up, zipping her suit the rest of the way up. Thankfully, the guard had been just as nervous as he sounded. She'd been able to distract him just long enough to allow her to slip by and escape. Still, this wasn't the plan. Mirror just hoped she could get out of here without any trouble.

'Come on, get a hold of yourself; I know it has been a while, but this is my second screw-up in less than a week!' She mentally scolded herself.

Turning to Look over her shoulder towards the street she had fled from; Mirror was relieved to see no police ponies or even the guard from the museum following her. Had she gotten away with it this easily?

"Stop right there, you criminal scum!" An amplified voice suddenly boomed from up above.

Mirror came to a halt and looked up, her eyes widening as she saw none other than the Power Ponies captain, The Masked Matter-Horn herself, floating above the alley. She was surrounded by her sparkling magic aura, with her arms crossed and an angry expression on her face. She reached out and pointed at Mirror.

"Surrender now, and you will not be harmed! Don't make this harder than it needs to be." The Masked Matter-Horn commanded, her horn glowing bright blue as she readied a spell.

'Shit, this is bad! If she's here, then the others probably aren't very far behind!'

Mirror broke into a sprint, darting for the end of the alley, where it would split off into three different directions. This side of town was known for its long and labyrinthian alleyways, which ran behind most street-side buildings. If she could lose a power pony anywhere, it was here.

Just then, as Mirror had been about to reach the first split, she suddenly felt the hairs of her coat stand on end underneath her suit. Without even thinking about it, she quickly dodged to the left, just in time to avoid a beam of frost, which crashed into the ground where she had just been running.

'Wha-? H-how did I?'

Mirror didn't have much time to wonder before she felt the sensation creep up again. This time she lept forwards involuntarily, narrowly dodging yet another icy blast.

'Okay, I don't know how I'm doing that, but I'll have to worry about it later!'

She dashed down the leftmost alley at the split, and Mirror heard the frustrated scowls of the Power Pony captain not too far behind. Mirror remembered the knife which she had come here for, a plan suddenly formulating in her head. If she remembered this particular side of town correctly, then the alleyway coming up on her left would lead to a series of sharp twists and turns. If she played her cards right, she had a way of getting this persistent Power Pony off her tail!

The Masked Matter-Horn shot down yet another ice bolt at the thief, only for the mare to once again dodge it just before impact.

'Drat! This mare is a lot more agile than she seemed. How does she know how to dodge my magic like that?'

While the thief was indeed also a unicorn, there was no way that the thief could be well versed enough in magic detection to be able to sense her spell buildups. Catching her would be crucial. Any criminal that was capable of something like this could become a serious threat indeed.

Suddenly, the thief dove left around yet another corner. Matter-Horn also knew this whole area inside and out, and the way the thief had just turned down was inevitably going to lead to a dead end. Now all she just had to was follow her until she cornered herself! Many of the old buildings this particular alley ran behind were long since abandoned, with many of them not even having proper fire escapes or doors through to the back.

'Soon, you will run out of places to go, and then you won't be able to escape justice!'

The Power Pony seemed to be giving Mirror some extra room for some reason.

'Maybe she knows that this is a dead-end as well? Whatever that won't matter if my plan works. If it does, I will have a plenty big enough gap to escape with.'

Mirror was now holding the stolen knife in her right hand. It once again glowed with a dim golden light as, unbeknownst to Mirror, a small symbol, just like the one she'd seen carved on the knife's handle, appeared on the back of her hand.

"Heh, she'll be distracted alright." Mirror whispered to herself darkly, a sinister grin accompanying her now glowing golden eyes.

Matter-Horn watched as the thief rounded the final corner up ahead before the inevitable dead end. She had her for sure now. But as the confident Power Pony glided around the corner to finally confront the criminal, horn charged and ready, she was shocked to find not a single soul present.

'What?! Where did she-?!'

Landing on the ground, The Masked Matter-Horn looked up and around but saw nothing, not a single possible route of escape. No fire escapes to climb up, no back doors to break through, and not even any windows.

'Could she have teleported away? Surely she would have just done that earlier if she was able to this whole time. Where In Equestria did she go?!'

Behind The Masked Matter-Horn, a transparent figure slowly emerged from the alleyway's brick wall, a glowing knife held tightly in its hand. Though faint, a sinister grin could be made out on the figure's face as it rose the blade into the air.

*Slash!*

"Gah!" The Matter-Horn gasped in pain, stumbling forwards and falling to her knees.

An intense burning sensation spread quickly throughout her body from what felt like a massive gash on her back. She winced and turned to face her attacker, finding the thief standing there, a strange glowing knife in her hand as she stared at the lower pony with similarly bright eyes.

'How did she get behind me?!'

In an attempt to gain some more distance, The Masked Matter-Horn concentrated her magic to teleport further away from the thief. Yet, just as quickly as she began to build up the magic in her horn, it being was drained out. Flowing through the air from the tip of her horn, it fed into the thief's knife, causing it to glow even brighter. As the last ounce of the Power Pony's magic was utterly drained away, she shakily got to her feet, now feeling incredibly weak.

"W-who are you?!" She demanded, straining to keep upright.

The thief only chuckled in amusement, completely disregarding her question. She winked at the weakened captain before turning and dashing away into the night.

The Masked Matter-Horn tried to give chase but was stopped dead in her tracks as a sudden and immense pressure made itself known in her bladder. Both her hands immediately shot down, digging themselves into her crotch in a desperate effort to hold back what felt like an entire ocean's worth of liquid trying to come out.

"N-no! Not n-now!" She grunted, pressing her thighs tightly together.

The burning sensation from the cut on her back seemed to fade away entirely now, leaving the mare desperately trying not to have an accident in her suit. Yet, due to her intense magical exhaustion, she was left helpless as occasional spurts of urine leaked out, creating dark patches in her spandex.

'Where is this all coming from?!'

The Masked Matter-Horn was used to the occasional unexpected urges to use the bathroom, but never with this level of urgency right off the bat. With the thief all but forgotten, she focused all her remaining strength on holding back the oncoming tide. But, just as she felt like she was finally getting it under control, a painful cramp struck, making the pressure seemingly double instantaneously.

Her tired muscles were finally forced to give in, surrendering to the yellow ride as a torrential stream of piss begun flowing into her suit, making a sharp hissing sound as it impacted the inside of her spandex. The crotch of the costume was very quickly soaked through as her hands filled with warm urine, which then overflowed and added to the growing puddle forming beneath her. Yellow waterfalls cascaded down her trembling legs, creating log streaks that shimmered in the pale moonlight.

Matter-Horn's breaths felt shaky and uneven as she continued to wet herself, but it was not from shame, exhaustion, nor even embarrassment, but from the immense pleasure fostered from her pussy. Her head felt foggy with nothing but feelings of intense relief, lust, and the warm sensation of liquid flowing down her legs and pooling inside her suit.

Her eyes rolled back, and she screamed out in ecstasy, suddenly reaching orgasm without so much as touching her quivering marehood. At the peak of her orgasm, she collapsed face-down on the pavement, her piss puddle still growing around her. As darkness closed in, her corrupted mind flooded with erotic fantasies. She pictured herself being found like this by a bunch of horny gangsters, her soaked rear and inflamed pussy sticking high up into the air, just waiting to be filled to bursting with their thick gooey seed...

Only once she'd fallen unconscious did the flow of piss finally start to slow, eventually becoming a light drip and nothing more. She was left blissfully unaware as a golden waterfall symbol appeared on her back, right where the thief's blade had struck her...

To Be Continued! In The Next Exciting Issue: THE POWER PONIES: Messy In The Morning!

Author's Note

Fun Fact Of The Side Chapter: The Masked Matter-Horn is a really long name.

I do plan on doing more of these side chapters centered around Spike's comic universe but it will likely be on very rare occasions when the inspiration hits me. Its good practice for when I'll be making up new story arcs anyhow.