One of "Dusk's" copies roamed around his castle, staying in the shadow as he was trying to find one of the four remaining mares that were looking for the original.

'Now, who will be my next target?' "Dusk" thought as he pondered on who he would find. Four mares with powerful magic roamed his home, and he was going to enjoy who he would find regardless. His thoughts were cut short when he heard the sound of hooves walking in his direction. He decided to blend in the shadows as he looked in the direction the hoof sounds were coming from. It turned out to be a rather upset Nightmare Rarity.

'Well, whom do we have here?' "Dusk" thought as he slowly trailed behind her.

"Another empty room.....just perfect." A frustrated Nightmare Rarity huffed as she left another room. It has been hours since she and the other mares split up to find Dusk. She had been looking in different rooms for hours now, and I'm sure the other mares were getting frustrated at not finding Dusk. Each empty room that she found only seemed to get her even more frustrated.

'Honestly, how hard is it to find one little Alicorn?' She thought to herself as she found herself in another empty room which appeared to be a guest bedroom. She had to admit, since his castle was rather big almost like Canterlot castle, it was easy to get lost. 'I need to calm myself. This stress is not good for my complexion.' Nightmare Rarity thought to herself as she sat on the guest bed. She pondered her next move as she slowed her breathing. This emphasized her impressive bust as it rose and fell in her jet black gown.

'Hmph....I guess I can just wait here awhile. If the others happen to find our little Alicorn, it will surely save me the trouble.' She thought as she relaxed on the bed, unaware of the predator that was currently looking at her through a crack in the door.

'This is almost too easy.' "Dusk" thought as he drank in the form of who he was looking at right now. The dark unicorn Nightmare Rarity's slim, yet curvaceous body rivaled that of Princess Luna's. The v-neck of her gown barely contained her bountiful double-H cups. Especially, with the amount of cleavage that was showing. The slit on the right side of her dress showed off one of her toned legs. "Dusk" loved the way her ass jiggled while he was trailing her. Dusk had to be careful though. Despite not being an Alicorn she had very powerful dark magic.

'Let's see...She is too strong to just take and break like he did the Dazzlings and Philomena...' "Dusk" pondered as he looked around. Seeing that the only door he was looking into was his escape, this room wasn't going to do him much good at all. No, he needed to lure her into another room, but first, he had to figure out the best way to work his magic on Nightmare Rarity. A sinister grin formed on his face, as he remembered a rather unique spell involving his aphrodisiac venom. He needed to find a more suitable room in order to set his plan in motion. He wandered about for a bit until he found a rather large room with a queen-sized bed in the center.

'She won't stand a chance.' "Dusk" thought, as he channeled his magic, laying his little trap for Nightmare Rarity. Now he just needed to lure her here. 'I might as well give her what she's looking for.'

-inside the guest room-

"Dusk" returned to see Nightmare Rarity hasn't moved since she sat on the bed and grew bored of trying to find him. She had no idea that the huntress has become the prey. He changed his shape to look like his weaker side, quietly stepped back a few paces, and started walking loudly towards the room. Nightmare Rarity was rubbing her hooves while still sitting on the bed.

"I am most definitely getting a hooficure once this is over. Perhaps I should also have one of my new slaves, Rarity, make me a new dress... maybe an entir--" She was pulled from her musings when she heard hoof steps heading in her direction. She was about to stand up and investigate when a certain male Alicorn snuck into the room.

"Okay, I think I lost them." "Dusk" said playing off his little disguise while taking a seat in a random chair. He knew Nightmare Rarity was behind him, but he wanted her to think she had the upper hand. Nightmare Rarity was at first shocked, but smiled devilishly as she couldn't believe her luck. Dusk practically walked into her fingertips, meaning that her plan with the other villainous mare will go into fruition. She got up from the bed quietly inching herself over to her prey.

"I still can't believe that illusion spell worked. Okay, if I can stay out of their sights and regain my strength, I can get to my friends and let them know what's going on." He added. He soon felt a cold gust of wind somehow blow through the windowless room.

"I'm afraid you won't get that chance, darling." Nightmare Rarity spoke in her calm, elegant voice. "Dusk" pretended to jolt when he heard her voice. He turned his head around and found a smiling Nightmare Rarity behind him. He jumped from his chair and crawled backwards towards a nearby wall. He pretended to try and spark a spell from his horn only for it to fizzle out, causing Nightmare Rarity to chuckle.

"What's the matter? Used up all your magic breaking free and casting that illusion, hmm?" She asked with a sly grin.

"H-how did you find me?" Dusk stuttered.

"I didn't have to do anything, darling." Nightmare Rarity teased, walking over to a scared-looking "Dusk". Her right hand reached out making him flinch but he eased up when she caressed his left cheek. "You practically walked right into my lap, so don't blame me if you were unlucky." Nightmare Rarity chuckled, unaware of "Dusk's" plan. "Dusk" then seemed to drop his scared look and regain his composure. "That little stunt you pulled earlier on us won't happen a second time. We're going to have to keep a tighter leash on you once I take you back to where the rune circle is."

"I wouldn't be so sure about that." "Dusk" remarked to a smirking Nightmare Rarity. "Dusk" then lit up his horn with a magical force as he put his plan into motion. A bright flash illuminated the room catching the dark mistress off guard. She yelps as she is temporarily blinded by the light. "Dusk" then made a beeline for the exit. Nightmare Rarity regained her sight after a few seconds, just in time to spot Dusk running out the door. She knew that if he got away now it would be a pain to find him again. She chased after him and tried to grab him. "Dusk's" plan was working like a charm, as he finally led her to the room that had his trap. "Dusk" turned around and pretended to be scared like he realized he had nowhere to go. Nightmare Rarity soon materialized in the room following, in her mind, her soon-to-be captured prey.

"Looks like your little trick didn't work, and now your trapped." She teased while walking towards him. "Dusk" continued to act scared, until she grabbed him by his throat, then he started chuckling. "What do you find so amusing? I've caught you." She asked him a little irked by his reaction.

"On the contrary-" He spoke as his trap activated above him. The door behind them closed and the room started to fill with a pink-colored gas. "I've caught you." Nightmare Rarity panicked as she breathed in the gas and started coughing. She threw "Dusk" to a nearby wall, causing the young Alicorn to grunt. She continued coughing, worried about what was going to happen to her. After a few moments, the gas started to dissipate. Once she stopped, coughing she looked at herself to see what happened. After not feeling anything for a few moments, she looked up and glared at a chuckling "Dusk".

"ENOUGH OF YOUR DAMN TRICKS!" She shouted as she teleported in front of "Dusk", lifting him by his neck and looked dead in his eyes. "You keep trying my patience and I'm mere inches away from breaking your bones." She threatened. This only caused him to actually start laughing. "What's so bucking funny?"

"Because that wasn't a trick, that was my trap." He replied.

"What are y-!!!" Nightmare Rarity didn't get to finish her sentence as she felt her body start burning up from the inside. She struggled to keep "Dusk" in her grasp, but she let him go as she dropped onto the floor to her hands and knees. She laid there panting as the burning grew worse. "Dusk" just stood over her laughing.

"I can't believe it took you so long to notice." He added as he watched Nightmare Rarity squirm. He then dropped his disguise and revealed his demonic incubus form in front of his new plaything.

"W-w-what...d-did you...do...to...m-me?" She asked panting as she felt her nethers dripping through her panties. "T-that...wasn't...poison...or an...illusion...was it?" She asked as she curled up into a fetal position. "Dusk" knelt beside her.

"That's right. As to why your body is heating up, that was an aphrodisiac gas I released from a thurible that I hung from the ceiling." He explained pointing to a censer that was hanging from a chandelier. "Now, I think it's about time we had our fun, don't you?" He added as his right hand reached outward.

"Y-you...bastard...don't...touch me...Mmph!" She groaned as she felt the heat throughout her body getting worse. She tried to channel her magic to try and release the gas from her body.

"Now, now... can't have you using your magic to try and escape, can we?" "Dusk" taunted as Nightmare Rarity felt something metallic being placed on her horn.

"What did you-" She didn't finish her sentence as her body felt as if it was molten lava. Her marehood practically screamed at her for release as the next thing she knew, she lets out a throaty moan and her feminine juices drenched her soaked panties and slowly made a small puddle on the floor.

"Well now, it looks like the new inhibitor rings I duplicated from the one Adagio had appear to be stronger than I thought." He said to himself as Nightmare Rarity laid there, blushing bright red and panting on the floor. She slowly looks up and glares at her captor as he circles her like a predator.

"What...in Tartarus...did you...do to...me?" She asked him, panting as the burning wouldn't stop.

"Well the new inhibitor ring I placed on your horn responded to the gas that was in your system, and amplified it ten times over." He explained while groping her soft flank and giving it a good spank causing the dark mare to yelp with a mixture of pleasure and pain. She lifted and turned her head and glared at him. "Dusk" then caressed her right cheek. "Each time you try to use your magic, the effects get worse. So if you don't want to make a mess, you'll do what I say." He remarked with a sinister grin.

"Bastard! I'll...get you...for this..." She panted unable to do anything as Dusk continued to grope her ass. She still had her clothing on and "Dusk" only wore a pair of boxers that did little to cover up his bulging crotch. He was going to lose them soon, and his new slave was going to lose her clothes in a few moments. He was going to savor every moment of this.

"Funny you mention that. I remember Aria Blaze telling me the same thing, before I made her my bitch." "Dusk" adds spanking Nightmare Rarity causing her to yelp again.

"D-don't...touch...me..." She panted as "Dusk" continued to grope her soft ass and his hands travel up to her breasts and give them a few gropes and squeezes. Nightmare Rarity felt disgusted having to be molested by who she and the other mares in the castle were going to capture, but she was too aroused to even do anything thanks to the aphrodisiac gas in her body and the inhibitor ring on her horn intensifying it.

"Mmmh...your body feels...so...heavenly...." "Dusk" moaned as he felt his member twitch in his boxers the longer he felt up Nightmare Rarity's body. His member was practically poking her ass and he made sure she felt it. Nightmare Rarity blushed as she felt how big he was from the bulge in his boxers. He was practically sinking into her but cheeks.

"You feel me...don't you?" He asked the darker mare who was blushing bright red. "You want me inside of you....don't you?" He adds grinding his crotch against her soaked marehood.

"Y-you...bastard! D-don't...bucking...joke...with...me..." Nightmare Rarity panted, trying to be defiant but the aphrodisiac in her body was making things difficult. Sadly she wasn't going to be defiant for long when he was done with her. What surprises her next, "Dusk" stops groping her and slowly backs away from her.

"W-what're...you doing?" She asks as she looks at "Dusk" and saw that he was smiling.

"I was getting bored just teasing you, so it's time I made things a little more....interesting." He added the last part with lust in his tone while staring at Nightmare Rarity's ass.

"Interesting......how?" She asked as she felt his eyes staring at her ass.

"Maybe a little shape shifting." "Dusk" added leaving Nightmare Rarity confused.

"What do you...." She didn't get to finished when she looks back at "Dusk." He started groaning and growling as his body started to change shape. The bones throughout his body shifted and molded as his muzzle, claws, and fangs grew longer, forming a rather long snout, his fur grew bushier almost turning pitch black. His hooves started splitting apart as sharp clawed feet appeared and his tail started growing out more. Nightmare Rarity's cat like eyes shrank to pinpricks when she saw Dusk's new form he practically looked more monstrous that he did before. His membranous wings were still behind his back as he gave them a good flex before walking over to her.

"W-what...are...you...?" She asked him as he just smiles.

"I'm half demon my dear, and demons can change their shape depending on the environment." "Dusk" adds as he picks up Nightmare Rarity by her neck and throws her onto a nearby bed. He pounces on top of her as she could only look back in fear as he raises one of his clawed hands over her head.

'H-he's...going to kill me!' She thought as she closes her eyes not knowing was going to happen next. He swipes his claws downward and a loud smash was heard. A few seconds later she felt nothing, so she slowly opens her eyes.

"M-my gown!!!" She screams as she looks down to find her jet black gown torn to shreds exposing her curvaceous body to her captor. She covers her her exposed chest and marehood in embarrassment, or at least she tried too. "Dusk" turns her over on her front where her ass was facing him exposing her moist her moist marehood. He had both of her arms behind her back in one hand, while groping her ass in another hand. "D-don't...look at...me..." She begged not wanting this to go any further.

"I'm against that isn't an option my dear." "Dusk" growled in a sinister tone. Nightmare Rarity was about to say something until she felt something long and hard grinding against her butt. She looks behind her back, and her eyes get big. Her gown wasn't the only thing that came off, his boxers were also torn to shred revealing his monstrous package. His new package became much bigger than his previous form, a large knot the size of an apple rested near his testicles. Speaking of his balls, they grew from the size of coconuts to the size of bowling balls.

"W-what're...y-you...going to do....with that?" She asked stuttering. "Dusk" only smiles at her and yanks on her mane pulling her towards him where his eyes meet hers.

"Takes a guess dear..." He adds grinding his length on her soft buttcheeks.

"Y-you must be insane! I-I'm not taking that.....that thing!" She exclaimed as he looked like he could break any mare with his size.

"Not like you have a choice. Depending on what form I choose, I tend to lose some form of self control. So unless I sate my desires as well as yours, you're pretty much out of luck." He adds as he begins to prod the entrance to her marehood.

"Th-that thing won't fit in me!" She pleaded, but it was too late. He pushes forward, and she feels her hymen give way to his monstrous length. She screams as his massive shaft forces her marehood to take shape of his new stallionhood. Nightmare Rarity felt her hymen give way and blood dribbles out from her marehood. Her body spasms as she grits her teeth in pleasure and pain. "Dusk" groans as his stallionhood feels inside her marehood. She was as tight inside as Philomena as she was clamping down on him without letting go of him.

"Fuck, your tighter than the sirens." He groans and Nightmare Rarity hears and slowly opens her teary eyes. Her tongue drags itself along her neckline as she groans in disgust of her captor. "This may be more fun than I thought." "Dusk" adds slowly pulls out of Nightmare Rarity until the tip was still inside. He then bucks his hips forward causing Nightmare Rarity to grunt and moan. A mix of pleasure and pain as "Dusk's" wasn't letting up. His thrust were slow yet steady, but he was very rough with her as he pounded her quivering marehood into submission. Nightmare Rarity struggled to try and get loose from the monstrous form of "Dusk", but he proved to be much stronger than she was. She felt his claws digging into her flesh as he bucks her senseless.

"Y-you..bass...ta...aaugh!" Nightmare Rarity couldn't hold back her moans as he pounded her like a wild animal.

"What's wrong?" "Dusk" remarks as he leans in close to where he was within earshot of Nightmare Rarity. "Are you losing yourself from how good you feel right now?" He teases giving The darker mare a hard thrust causing her to yelp. She bites down on the bed sheets as she felt his massive balls slapping against her clit and he made sure she felt it.

"B...bastard...I h-hate you..." She responded still being defiant.

"Do you really hate me? Or do you feel that you can't find love because of your actions?" "Dusk remarked as he slowed down his thrusts thus confusing a dazed Nightmare Rarity.

"W-what're you-!" She didn't get to finish her sentence as "Dusk" grips her slim waist as falls backward making the darker mare gasp. "Dusk" pulls out of her marehood, leaving his pelvis wet with marecum, flips her over and turn her around to where she was upside down with her legs draped over his broad shoulders. "N-now what're you doing?" She asks frantically as his nose plants itself into her deflowered marehood.

"Well, I think it's time I had a little taste of your ripe flower." "Dusk" replies and his tongue into her marehood. Nightmare Rarity flinched when she feels his long slimy appendage enter her dark flower. His tongue danced around her marehood. Her juices tasted of raspberries and grapes as "Dusk" ate her out. Nightmare Rarity could only squirm and moan as "Dusk" continued to eat her out. She had no means of escape as his muscular arms had a firm grip on her toned legs. It got worse for her when she felt his tongue circling her cervix. "Dusk" wanted to tease her more just to see how much Nightmare Rarity could take. It wouldn't be long before she cracked, and it would all be over. "Dusk" long tongue teases the entrance to her womb and he made sure Nightmare Rarity would feel it. His tongue soon enters her opening and she let out a pleasurable cry. Her entire body spasms as her vaginal walls tighten around his tongue and thus letting her feminine fluids drench his tongue. "Dusk" simply dranks what she offered relinquishes it with pleasure, pulling away from her marehood with a smirk on his face.

"Delicious. You're evil, yet irresistible." He remarked as he looked at the state she was in. She laid in a fetal position as her marehood was left drenched. Her body was soaked in sweat as she barely had any energy to move. She weakly looks up at "Dusk" who wasn't finished with her yet.

"N-no...more...p....please...." She begged, but that wasn't going to happen since "Dusk" wasn't finished with her yet. Especially since his throbbing erection was still standing proud. He glares at her with a sinister smile on his face. "Dusk" then has Nightmare Rarity in the anvil position and spreads her legs revealing her drenched slit, grinding his thick phallus into her abused hole. "Dusk" only smirks as he leans towards her right ear and whispers:

"You and I both know that's not going to happen." Those very words spells her doom when he plunges into her marehood and rails her like crazy. The sounds of wet fur on fur, Nightmare Rarity's carnal moans, and "Dusk's" wolf like grunts echoed through the room. "Dusk's" massive length slams into Nightmare Rarity's marehood and her insides were becoming looser as her captor had his way with her. Her moans grew in volume sounding more like carnal screams as she felt her mind completely clouded by lust. Her voluptuous breasts bounced with each thrusts as the sounds of lust echoed through the room. Nightmare Rarity's conscious already faded as she wanted more. She wanted "Dusk" to please her even more than what he was doing right now.

"More!!! More, you brute!!" She begged, "Dusk" noticing her expression changed and now he had her right where he wanted her. Seeing as she was long gone he gives her what she wants and increases the speed of his thrusts penetrating her cervix. Nightmare Rarity could see the bulge his massive length made in her stomach as "Dusk" toyed with her. After another ten minutes, "Dusk" let out a low growl and her pushes forward where the knot locks in place keeping him deep inside of her. His massive balls letting out a low gurgling sound. Dusk then leans forward and grips both of Nightmare Rarity's arms in one hand and her tail in the other.

Nightmare Rarity was close herself as she felt pressure build up in her loins. She knew what he was going to do, but she didn't care. She wraps her legs around his back wanting to get every drop he was going to offer. "Dusk" let out feral growls as his thrusts became slow and hard as he was close to relieving himself. A few more thrusts later, followed by a sinister howl from the demonic "Dusk" he gives her arms his back and yank on her tail. Nightmare Rarity let out a hoarse moan as "Dusk" yanked on her tail. Her walls tighten around his shaft and "Dusk" releases his pent up load inside the darker unicorns womb. "Dusk" was still cumming and she felt her once flat stomach balloon out fairly quickly. "Dusk" growled each time he stuffed her womb with his thick fertile seed. Nightmare Rarity's eyes rolled to the back of her head as she looked ready to pass out as her stomach bloated up to the size of a beach ball. They basked in their afterglow for a good 30 seconds before "Dusk" finally pulls out of the twitching mare.

A thick line of his semen connected his phallus and her marehood before he pulls away from her. His seed slowly seeps out of her abused marehood, but Nightmare Rarity didn't care. She had the happiest look on her face from the intense pleasure she just experienced. "Dusk" then reverts back to his previous incubus form and notices his new slaves' unconscious state.

"Heh....looks like I over did it a bit." He chuckled to himself picking up the unconscious mare in his arms. Considering her size and the added weight to her stomach, lesser stallions would not fare so well in carrying mares like Nightmare Rarity. "Dusk" carries her as if she was a delicate feather. "No matter. I can at least carry her back to the original Dusk." His final words as he snaps his fingers and a portal opens up in front of him. Holding an unconscious Nightmare Rarity in his arms, he walks through it retiring to the original Dusk.

Author's Notes:

I decided to save the dragon for a very special mare on the final clop chapter. But credit to Frankie2 for edits and to wolfman93 for the wolf transformation scene. Nightmare Rarity was tough to write out since I never read her comic, but I had fun writing it non the less. Next on my list, you get to decide. Umbra or Chrysalis? Also the clones of Dusk's will have "" marks. Credit to Frankie2 for that as well