Chapter 1
"No! It's them, or us."
Rainbow Dash looked at the Shadowbolt. She cast a glance back at the fog, beyond which she knew her newfound friends were waiting for her. Depending on her.
She could never leave a friend hanging.
"You... thank you. For the offer, I mean. But I'm afraid I have to say no."
"A pity," an ominous voice said from beyond the mist. "You could be so much more."
Rainbow gasped, immediately looking around for the source of the voice. She didn't have to search for long, however, as a tall, slender figure the color of the night strolled out from the fog. The Shadowbolts dissolved into nebulous blue clouds, which soared through the air and rejoined their mother behind the dark alicorn's helmeted head.
"Nightmare Moon!" Rainbow shouted. Her wide eyes quickly narrowed as she spread her wings and dropped into a threatening stance. "I'm not afraid of you!"
"How brave of you. Your courage is... impressive." She looked over Rainbow with her slit eyes, as if appraising her. "You have so much potential..."
She grinned. "It would be such a shame to let it go to waste."
Rainbow responded by launching herself into the air—or at least, she tried to. But instead of becoming airborne, she found herself rooted to the ground.
"Hey! What gives?" Rainbow looked down and found her hooves to be encased in a blue glow. She pulled as hard as she could, flapping her wings for more power, but they refused to leave the ground.
"I could help you, you know," came Nightmare Moon's voice, a whisper only inches away from Rainbow's ear. The trapped mare jerked away, yelping in fright.
"I could give you everything you've ever wanted. Fame. Adoration. Respect."
She leaned in close again. "And all you would have to do is submit yourself to me."
"Never!" Rainbow spat.
Nightmare Moon laughed, her fangs and her eyes flashing in the moonlight.
"Oh, but never is such a long time! I'm sure I can..." She took a step to the side of Dash and walked past her, extending her wing so that the tips of her feathers brushed along Dash's side. "...convince you."
Rainbow shivered, the unexpected contact bringing up memories and thoughts wholly inappropriate for the situation.
The caress ended at her flank, where the alicorn's feathers traced a slow circle around Dash's cutie mark. Panicking, Rainbow slapped the wing away with one of her own. Opening her mouth, she began shouting.
"Applejack! Twilight! Somepony, hel—"
Her shouts were cut off as something was jammed into her open maw. It felt like some crude form of bit as she ran her tongue over its smooth surface, a suspicion confirmed as she felt its straps tighten around her head.
"None of that," Nightmare Moon said. "Not that it would have helped; they can't hear us any more than we can hear them."
"Nopony is coming for you, Rainbow. It's just you," Nightmare's breath tickled Rainbow's ears, "and me."
Immobilized and gagged, Rainbow was now left to Nightmare's mercy. She could do nothing as her wings were spread.
"Such beautiful wings," Nightmare Moon said. "They'll serve me well soon, but you won't be needing them for this." They were pulled back into place against her body, and Rainbow watched as restraints materialized around them, tightening and pinning them down.
Next was her tail, the only part of her body besides her neck she could still move; it was pulled upwards and held there by the alicorn's magic.
Rainbow tried once more to break free, but it was no use.
"Your body's all mine now, little Rainbow Dash," Nightmare Moon purred. "All mine, to do with as I please."
She licked her lips. "And soon, you'll give the rest of you to me as well."
Rainbow tried to shout her defiance, but all that got past the gag were barely-coherent grunts. She couldn't move; she couldn't speak; she couldn't fight back. She'd have to endure whatever torture the evil alicorn had in store for her until she found a way to escape.
Then she felt something brush against her clitoris. It was cold, like ice, and Rainbow gasped past the gag at the touch. She whipped her head around, desperate to see what it was, but a pair of hooves clamped against the sides of her head and gently but firmly held it forward.
"No, little Dashie," Nightmare Moon said. "You don't get to look."
Dash felt movement against her coat and back, and after a moment realized that Nightmare had mounted her, her long legs letting her straddle the pegasus with ease. The alicorn's body was warm against hers.
The icy touch came again, this time starting against the inside of her thigh. It traced a path up, up, up along her leg, sliding along the side of her nethers before darting in and whipping across her clit. Despite her best efforts, Dash couldn't stop herself from shivering at the touch. She could feel her body's growing arousal, and she hated it.
It seemed Nightmare Moon could feel it as well. "Getting excited already?" She spoke into Dash's ear, even as the cold touch repeated itself on her other thigh. Her head lowered, coming down beside Dash's own, giving her a full view of the alicorn's fanged grin.
"Why don't I speed things up a little?"
Her long horn glowed, and instantly Dash felt a warmth spread through her body the likes of which she had never felt before. Her heart began to race, and she began panting into her bit. A tingling in her nethers told her she had begun to drip.
"Nnn..."
"What's wrong, little Dashie?" Nightmare Moon asked, mocking her. "All hot and bothered?"
It was getting harder and harder for Rainbow to focus, the lust and desire clouding her thoughts.
"I can help you," Nightmare whispered into her ear, punctuating it with a little nibble; the pain felt to Dash like ecstasy.
"All you have to do is ask."
"Nn... no..."
"Really?" Nightmare Moon asked as the cold brushed at her teased her nethers. Some distant part of Rainbow's mind screamed at her to keep refusing, keep fighting.
But she couldn't.
She needed this.
"Pl... Plush..." She muttered through the gag.
"What was that? I couldn't quite hear you!" The statement was punctuated by the cold making another pass at Rainbow's clit.
"Gah! Hah... Plush... Fuh me..."
"With pleasure."
The cold tendrils instantly wrapped around her back hooves and spiraled their way up Rainbow's hind legs, gripping them tight. whatever force had been securing them must have lifted, as the tendrils easily spread her legs apart, exposing her dripping nethers fully to the night.
All was still for a moment as Dash quivered in anticipation.
Something slammed into both of her holes with enough force to knock her forward into a presenting position. Her ass and pussy had to stretch to accomodate the size of whatever was violating her. She gasped, biting into the gag on reflex.
The things in her began to withdraw, slowly.
"Hmm, so tight..." Nightmare Moon's face slid into Rainbow's teary view again.
"Doesn't this feel good?" she said. 'Good' was accompanied by the things thrusting into her again, sending a wave of pleasure crashing through her body.
"Doesn't this feel right?"
The thrusting began to fall into rhythm with the words.
"Doesn't this feel wonderful?"
Thrust.
"Y-Yesh," Rainbow managed to say between thrusts.
The straps on the gag suddenly loosened. Rainbow opened her mouth and allowed it to be removed.
"Yes, my queen." Nightmare Moon demanded.
Thrust.
"Nnn..."
The movement ceased. Rainbow let out an involuntary whine, desperate.
"Yes, my queen." Nightmare Moon repeated.
She needed it.
"Yess... my queen."
Another thrust, the strongest yet, causing Rainbow to go weak at the knees and shout into the night.
"Good girl," Nightmare Moon purred.
Suddenly, Rainbow's mane was yanked back, forcing her head up. Something slithered into view, a solid wisp of stars and miasma.
It presented itself to her, and obediently she opened her mouth and let it slide inside, filling her mouth and throat and gagging her in an entirely new way. She began to caress it with her tongue and lips, even as its siblings continued to take her from behind.
"My, so eager—"
Thrust.
"—to serve—"
Thrust.
"—your queen!"
Thrust.
Rainbow could feel herself edging closer with each thrust.
It felt good.
It felt right.
It felt wonderful...
To serve her queen.
The tendril withdrew from her mouth, a trail of saliva following it from Dash's eager tongue.
"Who do you belong to, little Dashie?"
"You, my queen," Rainbow whispered.
"Who does your body belong to?"
"You, my queen."
"Your wings?"
"You, my queen!"
"Your will?"
"You, my queen!"
"Your loyalty?"
"You, my queen!" she shouted at the top of her lungs, "I'm all yours!"
"Yes, you are," Nightmare Moon said. "Forever."
One last, hard thrust, and at last Dash came, screaming her pleasure into the night. Her bindings disappeared, and she collapsed to the ground in a sweaty, dripping, panting heap. The ethereal tentacles in her pussy and her ass slipped out as she lay there, her fluids pouring out after them.
"One last gift to my most loyal servant," Nightmare Moon said. A sudden sharpness bit into Rainbow Dash's flanks, like the edge of a knife; in her drained state, she could only groan. With some effort, she twisted her head around to look.
Her cutie mark was gone, the familliar rainbow-colored lightning bolt replaced by a new mark, the winged skull of the Shadowbolts. The sight almost made her tear up.
There it was, the symbol of her undying loyalty to her queen, the brand marking her forever as her mistress' obedient servant.
It was her talent. It was her purpose.
It was her destiny.
Rainbow's endurance gave out at last, her mind fading into unconsciousness to the tune of her queen's receding hoofsteps and the sound of her laughter.
The cool touch of the fabric kissed her skin as she slipped the flightsuit over her forelegs. The material stretched and formed to her body, fitting to it perfectly. It had been made for her, after all.
The skull on the suit's flank matched her own perfectly, the suit gripping her flanks nice and tightly. Slowly, she did the suit's zipper up, savoring the moment as the second skin of her uniform enclosed around her for the first time. She pulled the mask up and over her head and her muzzle.
The goggles snapped into place over her eyes, completing her transformation and tinting everything slightly yellow. Enchanted to allow her to see even in pitch black, they let her fully join her queen's domain.
She stretched her limbs, then her wings, making sure everything was perfect. It was.
"Are you ready, my loyal Shadowbolt?" Nightmare Moon asked, stepping out of the shadows.
"Yes, my queen," Rainbow Dash replied, bowing.
"Good. We have much to do."
She smiled, her fangs gleaming in the light of the moon.
"Much to do indeed."