WARNING:

This is a clopfic. It's sole purpose is for you to jack off to ponies, bro. There are some weird fetishes in here. Not gore or scat or anything like that, but still. Enjoy!

Even Nightmares Have Urges

Luna was low to the ground, floating around in a ball of mist that resembled her mane. A hoof-shaped depression in the ground, followed by similar depressions in a zig-zagging line, told Luna that she was still on the trail. The mist form, while stealthy, eliminated all senses except for touch. Normally she would be trotting or flying along side the tracks, but she couldn't risk it now. If the thing that made these tracks found her, it would not matter if she was an alicorn or not; she was done for.

The hoofprints ended. Luna stopped and quickly floated around, looking for something to hide behind before she became solid again. A large, fallen tree provided just that, and Luna snaked behind it before a dull flash of indigo light gave way to the Princess of the Night. Luna peaked her head over the trunk and took in her surroundings. She was still in the Everfree Forest. The full moon stood high in the air, but that was unsurprising; it had been there for the past few days now. A streak of white flying overhead told Luna she was not alone in this hunt, as Celestia had been following her from the skies since the sisters had departed from Canterlot.

The sound of faint, ragged breathing tore Luna's eyes away from the night sky. Or day sky, as it was three in the afternoon, if you wanted to get technical. A small clearing off to her left housed the sister's prey, and so this is where Luna crept. Slinking low to the ground, quiet enough to make a jaguar jealous. The Princess's horn glowed for a moment, as did her eyes with their new found ability to sense thermal energy. A light red, Celestia-sized form shone faintly through the brush. Luna could hear the form dry heaving, possibly from it's wound it had received earlier from Luna.

"Good, she's still injured then. This will make her easier to defeat." Luna thought.

"All right Celestia. Ready?" Luna spoke directly into her older sister's mind. Another flash of white in the sky. "Okay, then. On three. One, two-"

"Three." The cold voice almost made Luna jump out of her coat, and she whipped around to face the pony who startled her. "Oh please, my little Luna. Did you really believe my injury to be that crippling? I do know healing spells, you foal." Turning to present her side to Luna, the Princess did see that the wound was much better looking than it was just a few hours ago. Where there used to be singed, black fur and a nasty burn across the alicorn's flank, now there was only a bandage and the teal crescent moon Cutie Mark.

"That burn should have taken weeks, if not months to heal. How could she possibly reduce it to a minor injury in just a few hours?" Luna backed away from the now-advancing Nightmare Moon. A quick thought to Celestia, and Luna only needed to bide her time for a few seconds more. "Just tell me one thing, Nightmare. Just how many wounds do you think you can heal at once?" Once again, the smaller alicorn's horn glowed, crackling and sparking with blue lightning.

That was enough to stop Nightmare Moon from looking so smug. As her own spear-like horn came to life, rippling with white-hot flames, Nightmare spoke. "And just who do you think you are, threatening me like that? Such a little foal couldn't possibly hope to beat me."

"I can." Luna smiled grimly when she saw Nightmare's face sink like a stone in the ocean as she realised who was behind her. Celestia already had the ethereal chains around the black pony, cementing her in place by the time Nightmare could turn around. Her horn sparked and the flames died down, causing Nightmare to rage and thrash in place.

Looking behind the enraged pony, Celestia gave her sister a small smile and winked. Luna stopped the readied spell, momentarily pausing to recover from charging and holding so much power. "Celestia," Luna had to shout to be heard over Nightmare Moon's screams of rage, "'Tia, I need to-"

"-RELEASE ME AT ONCE AND FIGHT-"

"-back to the castle-"

"-DISGUSTING, USELESS, COWARDLY WORMS-"

"SILENCE!" Luna shot a ball of white magic at Nightmare Moon, who stopped making noises but kept moving and flailing her head around. "Much better," Luna sighed. "Anyway 'Tia, I must get to know how Nightmare Moon is here, which requires going back to Canterlot quickly to get some equipment. Can you handle her for a moment?"

"Of course, Nightmare Moon will be no trouble for me. Go on." Celestia responded with a smile. Luna smiled back and gave her sister a quick hug before spreading her wings and...not being able to move. A sudden heat wave washed over Luna, making her pant and sweat profusely.

Celestia's brows scrunched up, and she tilted her head to the side. "Are you okay, Luna?" She asked, worried.

Luna could only sink to one knee, making it look like she was bowing. Her hoof trailed down her body, ending when it reached her moistening nether regions. Luna started rubbing quickly, the edge of her hoof already soaked as her tail flagged, giving Celestia quite the view. Small squeaks of pleasure escaped her as she moved to touch the hardening nub that ached to be twisted, rubbed, anything. This seemed to relive the unbearable heat wave that overtook her, but her cheeks still burned crimson.

Celestia felt like she had received a physical blow and took a step backwards, shocked at what her sister was doing. Her flank hit the still chained Nightmare, who was no longer enraged, but laughing silently with a wicked grin on her face.

Celestia turned her full fury on the pony and spun to face her. "What did you do to her, Nightmare? If she is harmed in any way I will not stop until you...STOP LAUGHING!" Celestia screeched. This only made the black alicorn tear up from laughing so hard. Celestia had to take several deep breaths to stop herself from ending Nightmare's life then and there.

At this point, Luna was now on her stomach, hind legs bent, propping her rear into the air. Her hoof was no longer enough, so she had conjured a long, plastic cylinder and was pushing it in and out of herself with magic, drawing quiet moans and gasps from her.

"Nightmare Moon, if you do not stop forcing Luna to...masturbate, I will end you." At this, Nightmare took on a look of mock sympathy and stuck out her bottom lip. Celestia's horn lite up bright gold and she took a step forward, touching the alicorn's horns together. A small spark at the area of contact, a brief mental struggle, and Nightmare's eyes rolled back in here head. The dark alicorn sank to the forest floor, then dissolved into it.

"What?" Celestia said, stunned at what she saw. "How-?" Celestia never finished her question, as a sudden breeze made her feel very cold. She curled up into a ball, laying on her side, shivering. Her eyes were shut tight as she had her front legs wrapped around her back hooves, which were touching her chest. "N-Nightmare, what are y-y-you doing to m-me?"

The pony in question materialized in a flash of blue light in front of the Princess of the Day. "Ha! I'm surprised at how long my decoy fooled you. Getting old, are we?" Nightmare took a step towards the freezing alicorn, leaning her head in close. "Luna seems to be enjoying her self, doesn't she?" Her question was punctuated by a loud moan by Luna as she orgasmed, her toy very deep within her, moving in quick strokes.

Celestia opened her eyes and looked into the teal ones across from her. "What d-do you want?" She asked quietly. The cold was almost unbearable, like being encased in ice a mile below the surface of the sea. Luna was panted heavily on the ground a few feet behind her, the toy laying, soaked and slippery next to her.

Nightmare laughed her cold, horrible laugh. "What do I want? Hmm, well, I want eternal night to last forever. I want to see you, broken and defeated at my hooves. But right now, at this very moment, I want sex."

Celestia knew this cold was affecting her mind. There was just no way that Nightmare Moon said that she wanted-

"I want to feel orgasm after orgasm nonstop for hours and hours. I want to feel somepony's throbbing cock pounding into me. Do you have ANY idea what 1000 years on the moon with only rocks laying around does to your libido?"

Now, Celestia was over two thousand years old. She was the sole ruler of Equestria for 1000 of those years. In that time, she had faced dragons, assassins, griffin hoards, politicians and journalists. Now was the first time in a millennium she had felt fear.

Nightmare Moon glanced at the now-sleeping Princess Luna and smiled. Celestia could feel her own mind shutting down to stop the burning cold that was attacking it. Just as she was about to fall prey to sleep, the cold vanished, a strong heat wave taking it's place. She felt herself being forced to stand by her own legs, which were not obeying her anymore. Celestia had a feeling she knew where this was going, and attempted to magically stop it. Even though she had the upper hand, Nightmare still had to put up one hell of a fight for dominance against Celestia's onslaught, the white alicorn having throne everything she had into one desperate attempt. It proved to be in vain, Nightmare Moon retaining control after the long magical duel.

Collapsing to her stomach, heaving from both exhaustion and heat, Celestia fell asleep. Nightmare smiled wickedly, casting a spell to make sure Celestia stayed that way for a while. She started towards Luna, a devilish look in her turquoise eyes. "This is going to be a whole lot of fun," she thought.