When the sole Prince of Equestria was awoken by the commotion going on in Canterlot castle, the first thing he noticed was that the moon was full, and had a far smoother surface on it than usual. The shapely unicorn head that once adorned it was gone. The second thing he noticed, helped by the explosion, was that his home was under attack.

He scrambled out of his luxurious bed, his curlers popping out one by one in his struggle. In his mind, he ran through his escape plan. Of course he had one, he pitied any member of royalty that didn't. No self-respecting member of the monarchy would sit idly waiting for some invader or marauder to finish cutting down their miniscule forces before leaving. A scan of his personal bookshelf led him to a single out-of-place tome: one whose spine bore the image of a rabbit instead of a title. One quick tug with his magic, and the gears and machinations within the castle churned as a section of wall, usually unnoticeable, slid aside, revealing a tunnel. The prince slipped inside, being sure to flip yet another switch inside the passage. The section of wall slid back, and he was never there.

As he calmly walked through the secret corridor, the battle raged on outside. There were calls to arms, bursts of magic, pained and panicked screams, and the occasional rumble of force that reverberated through the tunnel, sending dust falling from it's ceiling. It sounded like an intense battle, and Blueblood could hardly think of an enemy that would fight so hard. Not that it would do them any good. His aunt, Princess Celestia herself, had left hours ago to hold the Summer Sun Celebration in some backwater town called Ponyville. Evidently, whomever had decided to attack this night didn't think she would just come back here to defend the castle the second she found out it was under siege. What an absolute dunce that cretin must be, the prince thought.

Just then, an almighty roar, which could not have come from any mortal cretin, resounded from outside. There were several, great slams of force from above. Then the tunnel caved in.

When the dust began to settle, Blueblood could see a body in the rubble. Before he could investigate, a deep, commanding, but unmistakably female voice boomed, "AND DO NOT CROSS ME AGAIN, YOU LITTLE FOAL!" and the sound of great, sweeping wings taking off followed the owner. When he was sure she was gone, Blueblood crept warily towards the form buried in rocks. It began to stir. It rose from it's prone position, revealing a white unicorn, with a two-tone blue mane, adorned in purple armor trimmed in gold. Shining Armor, Captain of the Guard.

He was wounded. One black eye, several fresh cuts and his armor was barely clinging to his form, it was in such tatters. That monster had done such a number on him, it was no surprise he could barely stand. His breath was labored and each step he tried to take was peppered liberally with shudders of pain.

"Shining?" Blueblood said hopefully. Shining just ignored him, trudging painfully along.

"Shining." he said more forcefully, even as the captain slowed down and started to struggle just to keep upright.

"Shining!" he shouted once more. He was ignored again, but this time, the pony fell to the floor, breathing hard. He spent the last of his energy just walking a few feet.

"What is going on?! What was that thing?!" the prince urged, dying to know what threat could do such damage to the Shield Master of Canterlot. He could only manage a few words before losing conscience.

"Ca...Cadance....she......took her."

Blueblood could swear his heart stopped. Cadance? Princess Cadance? His older sister, the light of his life for countless years? In the clutches of some otherworldly monster? He was quiet for a moment. He turned in the direction she had flown. He ignored the other guards and soldiers, strewn across the halls like dolls. He ignored the scorch marks of magic and the assorted damage to the castle. He did not even mind that the blade he picked up had been shattered in half.

He simply galloped down the corridor. His escape could wait.

Cadance struggled against the grip of the beast. It carried the visage of an alicorn Celestia's size, but was twisted. She was like something out of a nightmare. Fur black as a moonless night. Piercing blue eyes that reminded her of dragons, slit pupils and all. A maw full of pointed teeth, pulled back in a terrifying grin. And from her shiny, armored head, a mane. A mane that was a deep blue that sparkled with stars. A mane she would very much admire if it were not currently threatening to strangle her.

"So," she growled, "my dear sister saw fit to make another alicorn while I was imprisoned? She thought my position could be replaced? Well, it seems she is still the fool after a thousand years. I will deal with you here and now, then continue my reign uncontested."

Sister?! Cadance thought. She didn't know her aunt had a sibling. Though considering her first impression, it was obvious why.

"Wait! Stop! I'm CaGnnhk!" Her protests were halted as the beast's mane tightened it's grip.
"You are no one and nothing to me, foal. I am Nightmare Moon. And Equestria shall be mi-!"

Nightmare herself was cut off as a glint if steel caught her eye. She reared her head back just as it sliced cleanly through the locks of hair that the princess were held by. She fell to the ground with a soft thud. For a split second, she met the eyes of Nightmare with a terrified face. Then she turned tail and jumped through a shattered window, taking flight.

The darker alicorn turned towards her attempted killer. Had she wasted one second in dodging the blade now imbedded in the opposite wall, it would have pierced her eye. She had a new murderous glint in her eyes. Were she not so excited by the prospect of another mortal to bring to her hooves, she would have been shocked to see that the white unicorn with blonde mane and blue eyes bore an incredibly similar expression.

"Stay away from my from sister, bitch." he commanded. Nightmare advanced on the stallion, never breaking her eye contact.

"And just who are you? To command me, the Ruler of the Night? she asked dangerously. The stallion scoffed.

"I don't recall Celestia giving up her position, and I severely doubt you can contest her for the title, so why don't you take your tantrum elsewhere before she returns to puni-"

Blueblood was flipped and slammed on the ground by an invisible force before Nightmare leapt upon him, fangs bared in a menacing manner.

"You arrogant, little, bastard. I am more powerful than Celestia will ever be!" she said as she pressed a strong hoof into his chest. "I should slaughter you right now for such disrespect."

Her words began to deflate Blueblood's bravado. The reality of his position started to dawn on him. He just assaulted some monster that came straight out of a fairy tale with the broken sword, called her a bitch, and threatened her with his Aunt's wrath.

You idiot, he thought. This nutty horse is going to kill you.

"However, I might see fit to spare you." Her expression softened as she looked him over thoroughly, and began to lighten the force behind the hoof on his chest.

Fear crept into Blueblood's voice as he asked, "W-What do you mean?"

At first she didn't answer. She simply moved her armored hoof against his broad chest. Slowly, almost sultry. A sort of blush could be barely seen on her black face. Her eyelids were lowered seductively as she licked her lips. Those signs all made the prince very uncomfortable.

"Oh, you can't hide your true duty from me, mortal. This bulky exterior and fervor in Celestia's name would mark you a guard. But this," Nightmare mused as she wove her cool hair under his chin. "is far too well-groomed, too handsome to risk in any battle. Yes, for all her obliviousness, Celestia still has fine tastes in studs."

"Studs!? I'm not her stu-oof!" Nightmare silenced him by pressing her hoof hard again.

"Alright, alright, her husband, or whatever she deigns to call you. The point is, I will be taking all that she has, all that she has denied me. Equestria, its ponies, their love and respect. I see no reason I should not partake of her toys as well."

Blueblood gulped as she leaned over him, their fur meeting together. She felt cold and dusty. Their faces met.

"So what will it be, Stud? Will you break your allegiance with the Sun, and give your services to the night instead?"

Blueblood considered his options: say no, and wind up far worse than Shining Armor a few rooms away, or say yes, and sexually placate some insane pony with a vendetta against Celestia who was deluded into thinking they were married until his aunt returned.

"Um, yes?" he offered her hopefully. She leapt off of him, looking delighted. Before he could get up, however, she turned and sat on him. His muzzle was shoved into her dark vagina, already slightly wet.

"Good! Now earn your keep, Stud!" she shouted, grinding her marehood into his face.

Blueblood nose scrunched at the prospect. Her folds were colder than the rest of her body. And the smell she gave off. It was....strange. Almost like burned gunpowder. He stuck his tongue out reluctantly, giving her a few licks. Nightmare shifted slightly. He tried to work his muzzle in a workable way, only getting himself deeper inside with every lap. The mare above him gave small moans every so often, and only pushed him further the more he licked. Finding it difficult to breathe, Blueblood worked his head down, attempting to maneuver his mouth and breathe properly, when he nudged a nub at the bottom of her entrance.

Nightmare gave a small yelp, and rose off him slightly. He took the opportunity to take a few gulps of air. The dark mare simply purred and lowered herself again, this time stopping when the prince put his hooves to her flanks to keep her at a distance.

She decided it was time to see what her sister was working with. She put her armored hooves to the stallion's sheath, which had already revealed the tip of his member, no doubt as a result of his excellent oral services. Rolling and rubbing the skin between her forehooves elicited a muffled groan from her stallion. His member began to grow, slowly rising from his crotch and throbbing with his steady heartbeat. When it became half hard, she moved her flowing hair down to his member, and engulfed it, moving along it's length sensually. This got Blueblood to tense up, and his leg to shake slightly. It felt like the grip of a cool night air. His member continued to grow and thicken to it's full size.

Nightmare smiled at her work. As she guessed, he was no slouch in this department. Unless the color, a nice shade of blue, was indicative of some sort of defect in this new age. Otherwise, it was perfect for her needs. She turned her head back to her stud, who was attending to her marehood dutifully. He caught her looking, and stopped, looking at her with a question expression. She smiled, showing her many pointed teeth, and opened her mouth and snapped it shut, showing off its almost audible sharpness. Blueblood's ears lowered in fear as she turned back to his member.

Extending her long tongue, she bent down and licked the tip, which was leaking the slightest bit of precum from her actions. She took great care to lick around the entirety of his large flare. Managing to work her lips around it, she began to gently suckle the tip. Blueblood was caught between the great pleasure of her on his dick and the terror that leaped through him whenever she could feel her dangerous teeth scrape against his skin.

Popping off his member, she licked her lips and began to slide her body backwards. This took her sopping wet vagina out of his face, and instead put his nose on her small teats. Nightmare eyed the thick stallionhood in front of her, and, taking a deep breath, plunged the prince's fleshly sword down her throat. Blueblood fought the urge to cry out. The depths of her throat was the coldest part of her body yet. She worked him without restraint, letting saliva coat his penis until it was dripping down his lower body in thick rivulets. The sound of her sucking echoed throughout the room, lewd and wet. Blueblood could feel an orgasm quickly approaching. Perhaps knowing this, Nightmare drew herself off of him with a loud pop.

Nightmare stepped off of him at last. Blueblood was relieved at first, as his back was beginning to get sore from lying on the ground. But Nightmare once again stopped him, this time by straddling him, and standing tall directly over his penis. She aimed it at her dripping entrance.

"Are you prepared, Stud?"

Blueblood, still throbbing, could only weakly nod. She smiled again, lined him up, and quickly drove him inside to the hilt.

"Eyaaaaahh!" she cried out, the sensation of being filled with a stallion's meat being sorely missed. But the prince had one of his own to let loose.

"GAAAAAAAAHH!" he yelled. The sensation of feeling her innermost depths was something he'd never felt in his life. She was absolutely freezing. He could swear that his princely pride was dipped in a deep freeze. The only thing that made him aware of his still possessing sensation in his dick was the incredible tightness that she used to hold on to him. And after that, it was her powerful riding that brought him back to reality.

She rode him with wild abandon, slamming her scrawny rump down onto his thighs. Her panting was wild, almost desperate, and her tongue lolled out of her mouth with pleasure. Every time she drove herself down, there was a loud squelching produced by his lubed cock's joining with her drooling mareparts. The prince could only grunt in equal parts pain and pleasure as she worked his body for all it was worth. Through it all, he could feel his orgasm approaching quickly.

Suddenly, Nightmare leaned over him, increasing her rate and panting her cool breath directly in his face and letting her drool drip onto his face. Then with one final snap back up, she came. Her cry of ecstasy was deafening, a primal scream that rattled the ceiling of the room and broke every window that wasn't already shattered by her earlier fights. Prince Blueblood felt the splash of liquid at his thighs and it brought him hovering over the edge of his own orgasm.

All of a sudden, with a loud slurp, Nightmare got off of him, a thin line of her juices trailing after her. She whipped her hair to his at-attention member, and wrapped it around. The soft touch brought the prince to orgasm, but the hair tightened unexpectedly, and the flow of his seed was impeded. Desperate to get off, Blueblood struggled to get free of her ethereal grip, but she held fast. Eventually, his orgasm subsided and he ceased his struggle, going limp in her clutches. Satisfied he wasn't going to finish, she let him go with a smug look. His response was one of seething spite.

"Oh, don't worry, Stud." she said in mock sympathy as he was finally allowed to get up. She turned away from him lifted up her tail, squatting slightly to accommodate for his lesser stature. "Show me your true might, and I just might let you ruuuUUUUT!"

She broke into a yell suddenly as the prince threw caution to the wind and entered her. He ignored any further taunts, and protests or commands were lost as he hammered into her. Even her frigid insides gave him no pause. The only sounds that could be heard were the vulgar squelchings and slappings of their bodies that were beginning to mat with sweat. Each merciless thrust pushed her farther forward, until her body met a wall and her head was forced to look backwards at him, his face screwed in anger that she mistook for great effort.

I'm the Prince of Equestria, he thought as he humped her. I'm no one's toy, no one's 'Stud.'

The mare beneath him started to whine as her second orgasm built.

No one uses me, because I use them! Blueblood yelled internally. Every other thought was drowned out by the splash of fluids and the shriek of joy that came from Nightmare. He gave a guttural groan of his own as he was finally able to cum himself. He only gave a few shallow jerks as he filled her insides with his royal seed. Keeping a vice grip on her flanks, he stained her insides white, noting with the smallest of smirks that her canal had a far more tolerable temperature with the addition. She leaned her head back and caught his mouth in a kiss. Blueblood was surprised, but nonetheless returned it, playing with her lithe tongue and dangerous teeth as she probed the confines of his mouth.

When he was done riding his orgasm, they broke the kiss, both of them panting from the exertion. Releasing his death grip, he slowly slid out of her, his flare disengaging with a shluck and falling on his back, spent for the time being. Nightmare slowly circled his spot on the floor, a very satisfied-looking on her face, and a few drops of the prince's seed dripping from her.

"I certainly think you and I will get along," she purred. "I've important business to attend to, so rest for now, Stud. For we will repeat such actions as this again, and again, and again, before this night is over. Because," she said, her wings extending, "it will last FOREVER!

With this final bellow, she blasted a hole in the roof, and took off into the night, her cackling filling the night air. Blueblood could only watch her, catching his breath and shuddering at the coolness he felt.

It might have been hours, or simply minutes afterwards that he opened his eyes to the sweet, familiar voice of his sister panicking.

"BB! What happened?! Where did she go!? What did she do to you!?" she yelled.

"She, ugh, we, eh. Had a grand time, dear sister." was all he could respond with before his world went dark.

Author's Note

And that's the first clop I've ever written.

As always, comments, critique, and checking out my other stories is recommended.