Author's Note

Now for a brief sexual Interlude.

Apologies if you're not into that, but I was feeling horny and wanted to write something erotic. Also I'm new to erotica, so double apologies if it does nothing for you.

My description of Tartarus is also drastically different to what you see on the show - it's closer to the traditional image of hell (fire, brimstone, ponies being tortured).

If anyone is interested in Phoenix and how he ended up in Tartarus despite his alicorn status and healing powers (a long shot, I know), I'm planning an origin story once this one is finished.

Feel free to skip this chapter if you're more interested in Starlight's suffering... That'll be next week...

A Brief Romantic Interlude

Phoenix ambled through the upper level of Tartarus, while Rarity’s disembodied spirit sat on his withers. She watched as he sauntered confidently along a scorching coal pathway, stomping lesser demons who got in his way and kicking away any that tried to follow them. Occasionally, small rat-like creatures would stare at her curiously, and some made the foolish mistake of jumping up to try and touch her. This inevitably led to Phoenix blowing fire from his mouth to drive them away.

“Ugh, what are those?” Rarity asked.

“Mule rats,” Phoenix informed her. “some of the ponies who arrive here are punished by being placed in the body of a rodent; I wouldn’t be surprised if those two high class ponies suffered such a fate.”

“Why are they so interested in me?”

“Because you are new, and because you don’t have a body yet; those whose bodies are destroyed in death are immediately given a new body when they crossover to here, but there are exceptions to the rule,” He explained. "you yourself are such an exception; you are the one who summoned me, and there is a different protocol for summoners.”

“So, where are we going?” She wondered as they appeared to be coming up to the very top level.

“Home.” He replied.

As they turned a corner, Rarity saw a great big building protruding from a wall of smoke that rolled downwards and over a cliff like a waterfall. It was bigger than her home in Ponyville, and it bore an uncanny resemblance to Canterlot Castle. The exterior shone and glittered in the ominous purple glow that filled the entirety of Tartarus, and Rarity’s keen eye determined that it had been delicately carved out of a natural obsidian deposit.

“THIS is where you live??” She gasped.

“My apologies if it is not regal enough for your tastes,” He said. “but I spent centuries creating it.”

“It’s magnificent!”

Phoenix smiled to himself as he used his magic to open the door and strolled in. Rarity was further stunned to see the inside; the walls were decorated with blue tourmaline as bright as the sky on a sunny day, and the furniture was a sumptuous mixture of amethyst and peridot, while a diamond chandelier hung from the high ceiling.

“So, this is what you did with the gemstone hoard I gave you.” Rarity grinned, admiring the grand marble staircase ahead of them.

“You were so generous with your gems, I couldn’t just stockpile them – I knew I had no closet or storage big enough to keep them all in,” Phoenix admitted. “I had some of my demon dogs do a spot of decorating.”

“Surely I didn’t give you this many though,” She insisted. “certainly not enough to redecorate such a sprawling home.”

“Most of them were used to adorn the various accoutrements in my bedroom,” He admitted. “but the chandelier and the immediate furniture here in the entry hall were beautified courtesy of yourself.”

“I don’t know what I was expecting, but this is a most pleasant surprise!” She beamed at him.

“Come, let us go upstairs so you can rest,” He said, heading up the staircase. “you’ve had a long, tiring day.”

“I’m not that tired; actually, I’m more excited to see my new body.” She chirped.

Phoenix said nothing. Yes, Rarity would be getting a new body, but it was not as simple as she was imagining in her mind. He got to the top of the stairs and walked forward, down a hallway with closed doors on both sides. She was very curious about the doors – wondering what kind of secrets a demon of his calibre would be hiding behind them – but she also didn’t want to pry into his private affairs. At the end of the hallway was a gold door, which opened automatically as Phoenix approached. The room they had walked into was bathed in a multicoloured light, beaming down like a kaleidoscope. Rarity recognised a princess-cut emerald (among other colourful gems) hanging from a candle lit chandelier on the ceiling, and theorised that this room belonged to Phoenix. It was quite a simple room, with the main feature being a large, comfy-looking canopy bed, and Phoenix looked very happy to see it. He clambered onto the soft, feathery surface – forgetting for a moment that Rarity’s spirit was still resting on his withers – and dropped onto it happily.

“It looks like you’re the one who’s tired.” Rarity giggled.

“There’s nothing quite like being back in one’s own bed.” Phoenix replied.

“How you managed sleeping on that bean bag in my room I’ll never know.” She nodded.

“I am grateful you found a soft place for me to sleep,” He smiled, licking her cheek with his forked tongue. “no other summoner ever cared enough to offer me the accommodation you did.”

“What kind of hostess would I have been if I didn’t try to look after you?” She batted her eyes at him.

Phoenix smiled. Rarity was an exquisite soul, hard-working and generous to a fault. Those blue eyes of hers bore into his heart and made it beat even faster. Thousands of years in Tartarus had made him hard and cold, but she had a smile that could make him melt and go weak in the knees. From beneath his pillow, he retrieved a sapphire necklace on a gold chain and presented it to her. Rarity’s eyes lit up at the size of the ocean blue gemstone and squealed in delight as he draped the piece of jewellery over her head. The gem rested directly over her heart, and she threw her forelegs around his neck.

“Thank you so much!” She kissed his cheek. “Oh darling, it’s gorgeous!”

“It’s a little welcome present procured by Ebony, my most prized demon dog,” He replied. “she’s in contact with the diamond dogs from Ponyville, in case you were wondering about the rest of my gemstone-covered abode.”

“I’ll admit I was curious about how one could create such a stunning home in a place like Tartarus,” She confessed. “I knew you were high up in the ranks, but it still seemed unlikely regardless.”

“Even though I had to fight for my position, alicorns are born to rule; being in the underworld does not alter that fact,” He chuckled as he affectionately nuzzled his nose against hers. “you are so beautiful, my dear; my temperature rises when you look at me…”

“Why thank you,” She blushed. “you’re such a charmer.”

Rarity leaned up against him; his body was deliciously warm. She snuggled up closer, rubbing her face on his shoulder and sighing whimsically. For the first time in over a year, she was able to relax – no nightmares, no spells to prevent Princess Luna from seeing what she was going through, no late night study sessions, no early morning sewing – it was wonderful to just unwind. She casually looked down at her hooves and noticed that they were no longer translucent.

“Phoenix, look!” She squeaked, touching her body and finding it solid. “I’m not a spirit anymore!”

“It’s the sapphire from the surface world, it’s helping your body acclimate to this new environment.” He elaborated.

“I guess I don’t need a new body after all.” She grinned.

“I’m afraid it’s not that simple,” He cautiously told her. “the sapphire is giving you a solid form right now, but if you take it off, you’ll immediately turn back into a spirit.”

Rarity’s front hooves hovered near the blue gem. Desperately wanting to test what would happen, but equally frightened about it being true, she eventually removed the necklace. In an instant, her body returned to its ethereal form and the jewellery slipped from her hooves. She was stunned. It was true – the necklace was giving her solidity, and without it, she was as disconnected from Tartarus as she was from the surface realm. Rarity could feel the tears welling up, and she sniffled hard, trying to keep the floodgates from opening. Phoenix calmly raised the necklace in his magic and placed it where it belonged – around the neck of his darling Rarity. She solidified once more and glanced up at him with saddened eyes.

“Will I never have a proper body again?” She wept. “Will I only belong here if I wear the sapphire?”

“As I said, there is a protocol for giving summoners a body that is connected to Tartarus, but I do not wish to push you, especially not while you are in this state.” He mentioned.

“Tell me! Tell me what I must do!” She spoke resolutely. “I will do anything! I just want to belong!”

“To obtain a body that will forever connect you to this realm, you must indulge in an exchange of fluids with someone of Tartarian residence…” He said.

Rarity blushed to the roots of her purple mane. Was he talking about… sex? Phoenix was a demon alicorn, and he was twice her size – he could very easily have had his way with her and been done with it – but he was more concerned with not wanting to ‘push her’ into anything. This stallion, who scorched the bodies of his enemies, took no disrespect from anyone, and seemingly ruled over Tartarus as a regular alicorn would rule over Equestria, had more respect for her comfort and boundaries than anyone she had ever known.

“Fluids?” She stammered.

“Blood is the standard for pacts like these, but everypony immediately thinks of something far more sordid when I mention it,” He chuckled. “naturally, intercourse is also an option, but precious few have ever chosen it.”

“I see…” She breathed. “Have you… have you done it before?”

“Do you mean intercourse as a means of solidifying a summoner?” He wondered as she nodded fervently in response. “Only a couple of times.”

“I see…” She repeated, secretly relieved that he too was relatively unaccustomed to sexual matters.

“All the other times I did it were purely for enjoyment.” He elaborated.

Rarity blinked at him, unable to control her expression of concern. She recalled her first attempt at sex – a drunken roll around with Spike at a party that got a lot more raucous than usual – and wondered if it counted. He was so sloshed that he didn’t remember it the next day; to be honest, even she struggled to piece the event together, following a nasty hangover.

“I am woefully inexperienced.” Rarity sighed.

“I would love to give you some experience, but I can give you my blood if you prefer.” Phoenix noted. “I realise that a demon from Tartarus is probably the last on your list of ponies you’d like to have fun with, but I would be more than happy to give you what you need to become whole.”

“Supposing I do want to have fun with you,” She purred. “would you be willing to have sex with somepony as lowly as myself?”

“You are far from lowly, dearest; you are too talented, too alluring, too elegant to be considered anything less than my equal,” He growled. “you are a heavenly body, and if you want me, then I deem it an honour.”

“Oh Phoenix,” She swooned, falling backwards. “come and give it to me.”

He caught the scent of heat from her general direction and leaned over to lick her nethers with his hot, wet tongue. Her eyes rolled back, and she began to moan with each lap he gave her. She slowly spread her back legs, practically inviting him to enjoy her body. And he obliged, thrusting his long probing tongue into the plump, white-pink lips that stared back at him. Perhaps it was the pheromones, perhaps it was Rarity’s willingness to be taken, all Phoenix knew was that this is what they both wanted – he wanted to fuck her, and she wanted to be fucked. He savoured the erotic sounds that she made, and the taste of her peachy flesh. The voice, the writhing hips, the squeals of enjoyment all made him throb and harden, as his burgeoning shaft became stiffer to her vocalisations.

“Rarity, my precious amethyst,” He panted. “you taste divine.”

“Phoenix, darling, let me give you some attention,” She gasped, already nearing her limit. “it’s only fair.”

She sat up and found herself face to face with the longest, thickest, meatiest cock she had ever seen. Her jaw dropped, and she couldn’t help but stare at the monster between Phoenix’s legs. He, for his part, was not affected by this reaction, for it was the same reaction he always got – whether with a summoner or a sinner, they were all floored by his size. Rarity noticed a glisten on the very tip of his shaft and was drawn to viscous fluid as a single drop dangled down from it. As if hypnotized, she approached the daunting appendage and opened her mouth, slowly licking and kissing it while trying to take in as much of it as she could. She had never given this kind of service before, but his mesmerising scent drew her in, compelling her to lavish him with her oral love.

“You are very good at this considering your innocence,” Phoenix murmured. “such a delicate tongue…”

Rarity didn’t respond, too busy savouring the natural musky taste as she ran her tongue around the wide head. She recalled when he first appeared in her home and being utterly terrified – she was the one who summoned him, but she did not expect somepony so physically daunting. Just finding information about him was difficult enough, let alone the ritual required to bring him to the mortal realm. In the aftermath of the Friendship Test, she had snuck into the restricted section of the Canterlot library – courtesy of Twilight, who had told her where it was when she first learned of it – and began searching for some otherworldly force who could help her properly avenge her friends; that was when she learned of the forsaken alicorn prince. The adrenaline of her intelligence mission came flooding back as she enthusiastically lubricated his meaty weapon.

“Rarity…” Phoenix growled. “I must have you…”

“You’re so big,” Rarity drooled as she removed his cock from her mouth. “I don’t know if I can handle it.”

“Fear not, my healing ability can soothe you as needed,” He assured her. “I promise you will feel only pleasure.”

“Those powers of yours are terribly useful, aren’t they?” She winked at him.

Placated by his answer, Rarity rolled onto her front and raised her rear end in the air, waving her hips at him teasingly. Phoenix stood over her and began to probe her undercarriage with the tip of his raging erection. As his hot flesh poked and prodded at her lips, moisture accumulated on them, dripping in anticipation of what was to follow. He manoeuvred himself into prime position, and deftly slid into her slippery opening. Rarity let out a loud, overwhelming groan as he entered her. Phoenix snorted in excitement as her walls gripped tightly onto him. As promised, his magic ignited and soothed the stretched inner area, as he continued to push his abundant rod past the cervix and into her warm, welcoming uterus. Rarity moaned and grabbed at the bed covers with her front hooves – she could feel her juices leaking further as her lips eventually touched his preputial ring; he was just over halfway inside her.

“Fuck,” She swore, biting her lip. “you’re not even all the way in and I’m positively drowning in ecstasy.”

“Good…”

Her legs shook as he slowly pulled out and thrust back into her. His massive member was stretching her in ways that should’ve been absolute agony, but all she could feel was the carnal decadence of his girth pressing against her inner walls, and his magic producing more oxytocin than her body knew what to do with. He began to move faster, and his powers continued to make painless repairs as he savaged her sumptuous pussy. Rarity’s moans were becoming high pitched and desperate, and she grabbed the edge of the bed to steady herself as her legs started buckling to the sheer indulgence. Before she could openly acknowledge how close she was to the edge, she was already tipping over it. She let out a hedonistic squeal of delight while her love liquid squirted out and lightly splashed Phoenix’s balls.

“Oh, my stars…” She breathed, flopping down onto the bed with him still inside her.

“Your walls are pulsing against me,” He said as his hips shook, desperately wanting to continue. “and we must finish the ritual.”

“Just a minute,” She shakily pushed herself up and rolled onto her back, moaning as his still inserted phallus rubbed against her as she moved. “I want to see your face.”

Phoenix leaned down and affectionately nickered at her, nuzzling his face against hers. Rarity hooked her front hooves onto the cannon of his forelegs and nodded at him; a signal that she was ready. He immediately thrust into her with all the energy that had built up in his hips, roughly fucking her to an orchestra of her vocal approval. Having reached her tipping point, her insides were now even more sensitive than they were before, and she could feel her mind going blank from the sheer intensity of the pleasure she was experiencing. Every thrust of his powerful hips, coupled with the alleviating tingle of his healing magic, was forcing the lewdest of sounds to come out of her mouth.

Between her bouts of boisterous squealing, she gazed at him with pure longing in her glittering blue eyes. This salacious look inflamed his desire beyond anything he had ever felt before, and with a deep thunderous whinny, he started ploughing into her with full force. Rarity’s eyes practically rolled into the back of her head when she felt his testicles bounce against her rear end – he had managed to get the entire length of his XL-sized pipe into her distinctly small interior. She took an extremely deep breath before the hyperventilation started, followed by a strange gurgling sound that timed exactly with each lunge he gave her.

“Rarity, are you okay?” He gasped.

She couldn’t speak for the delirium of enjoyment that washed over her, but she managed to nod in response. He could see that even with the assistance of his curative abilities and the obvious bliss she was feeling, she was becoming exhausted. Her juices were squirting out again, and it dripped down his groin with a delightful tickle. Phoenix could sense himself getting close to the precipice, and he hissed and snarled like a wild beast as he rammed into her.

That was when he could hear her groaning becoming high pitched again; she too was on the verge.

“Don’t stop!” She pleaded.

Simultaneously, both Phoenix and Rarity felt the sweet euphoria of completion. She shuddered and howled in ecstasy, while he threw his head back and unleashed a mouthful of fire as he released the first wave of ejaculate into her body. Her pussy twitched and writhed against his cock, milking a second, then a third shot of hot white liquid out of him. It was after the fourth and fifth eruptions, that Rarity noticed her white coat was changing colour; from her nether regions outwards, a swell of deep violet colour was sweeping across her like dye. A further two gushes of cum later, and she could feel her entire body tingling – her breathing was calming down, her mane and tail were lightening from royal purple to sparkling lilac, and… was it her imagination, or were her limbs getting longer?

Phoenix breathlessly retreated, gently pulling out from her and giving her an adoring smile. His healing continued to negate any pain that occurred from their unruly sex session, and when he finally removed himself entirely, there was a ‘pop’ sound, rather like a soda bottle; fluid explosion included. Rarity looked embarrassed, complete with flattened ears – she didn’t mean to leave a wet spot – but Phoenix repeatedly licked her cheek, silently assuaging her self-imposed guilt.

“You were delicious,” He praised, flicking his tongue at her and tickling her nose. “thank you for giving me that opportunity.”

“I should be thanking you,” She remarked as she kissed his lips. “that was amazing.”

“Perhaps you would like to see your new body?” He suggested.

Rarity stood up, and immediately noticed that the height difference between them had lessened. Excited by this, she cantered over to a floor-length mirror on the other side of the room. Oh, how he enjoyed the happy expression she made when she saw herself. Staring back at her, was a tall, elegant figure, with a flowing mane and tail. Her horn was longer and came to a delightfully refined point – even her eyelashes were more chic-looking and feathery.

“I… I look like a princess!” She chirped.

“You always did to me.” He grinned.

“Shameless flatterer,” She smirked at him. “I mean, my body is just like an alicorn’s; minus the wings anyway.”

“Well, you’re immortal now – so you’re practically an alicorn,” He noted. “perhaps we should give you a grand name to go with it.”

“I do rather like my name…” she muttered, unsure of this idea.

“We could always add to it,” He suggested. “a dual name would suit you nicely.”

“I trust you, Phoenix Blaze,” She smiled. “what do you recommend?”

“How about… Nightmare Rarity.” He baited.

Maybe it was the way he said it, maybe it was the strong connotations, but as he said the words, a chill ran up and down her spine.

“Oooh, I love it!” She giggled wickedly.

“I’m so glad,” He beamed. “now you have a name and a body befitting your refined, elegant self; hopefully, this makes up for being eternally tied to Tartarus.”

Rarity trotted back to him with a soft, doting look in her eyes. She brushed herself up against him, playfully nickering at him as she did.

“This body is a most beautiful gift, as is my new name, and the revival of my friends,” She whispered in his ear. “I am not eternally tied to Tartarus; I am eternally tied to you, and that’s the best gift of all.”

Phoenix melted at her devotion. Never in his wildest dreams did he ever imagine anypony having this kind of effect on him. He thought he would always be cold and hard and vicious, but from the day she summoned him, all that began to shift. At first, he was still as aloof and stern with her as he was with any other summoner, however, when she went out of her way to find him a comfy place to sleep, something changed in his mind. The next day she was offering to make him breakfast, and he was mildly confused. When he began teaching her his methods, she was pretty squeamish at first, but she never questioned him or refused to do what he asked. She also made him a warm blanket – which wasn’t necessary but very much appreciated – and even her cat seemed to like him, snuggling up to him on more than one occasion. He felt quite guilty taking Rarity away from her beloved pet, but he hoped that one of her resurrected friends would adopt sweet Opal.

“I have one more gift for you.” He boasted.

“Now you’re spoiling me!” Rarity teased.

“There’s the little matter of a certain pony’s punishment,” He mentioned with a smile. “I wonder if you would like to go and tell her what’s she’s in for.”

“I’d love to…” Rarity chuckled maliciously.