"Oh, how wonderfully appropriate, Master." Rarity's melodic voice rang out behind the dressing curtain. She and Spike were in their private chambers, a personal room that Celestia had set up in secret over eight hundred years ago. A long-standing mystery for the ponies of Equestria, many a fairy tale book would speculate who the room belonged to. Celestia spared no expense in keeping it clean and up to date with all the finest luxuries, even to a better extent than her own. Romantics had speculated a secret lover, horror writers wrote of an evil demon that must be appeased, tragic writers spoke of a long lost love of hers... well, Luna had a separate room.

Obviously though, the real purpose was for Spike to use when it was time for him to take Equestria for his own. And naturally that was where he was, sitting on the finest bed in Equestria. Waiting for the sexy treat that Rarity had promised him from behind the dressing curtain, as they discussed Rose's actions regarding the Slutprincesses and Nightmares counterparts. "It seems Rose has risen to the occasion, and now we have another two alicorns to add to our collection."

"Yes, she had been having some confidence issues before, but it seems that Chrysalis was able to deal with that. Could say she fucked some sense into her." Spike said with a chuckle that earned a similar laugh from Rarity.

"Yes, I imagine she did, it seems your daughters respond strongly to that sort of lesson." Rarity teased, pulling her new dress on top of her shoulders. "Something to keep in mind with Chrysalis's new twins. Such a greedy girl she was, getting twins like that."

"You almost sound jealous."

Rarity let out a sweet laugh. "Jealous, moi? Whatever would I have to be jealous of?" She stepped out from behind the curtain, with a seductive, confident smile. As usual, the outfit she had chosen was divine, a slutty nurse outfit now squeezed her perfect body. Made from the tightest pale pink latex, it was barely able to conceal the red lingerie that Rarity had squashed underneath, leaving every trace of her glorious body bulging out of the outfit. "After all, could Chrysalis ever compete with my beauty?"

"She could try." Spike said as Rarity climbed onto his lap, the dragon's hands roamed Rarity's back. "But somehow I suspect she'd miss a few key details."

Rarity's moans were soft and intercut with girlish giggles. She loved this part, having Spike explore her body, her divine body whilst he talked of the other women he'd ravaged and conquered, and tell Rarity how they could never compare to her. To the diamond in his horde.

"We should make it a game." Rarity suggested, gasping hard as one of Spike's fingers slipped into her ass, a quick yelp of joy escaping her lips.

"Oh?" Spike asked, slowing slightly and raising an eyebrow.

Rarity's creative mind gleamed with sinister intent as she laid out her plan. "Invite her back here and have her change into my form, and watch her face as she realises that she can't hope to match my beauty. Then whilst you fuck her as she takes my form, we'd watch her face squirm as she tries in vain to compete with my skills, my beauty and my magnificence as the diamond in your horde, and watch her fail every time."

"Fuck, you do have a sadistic streak when you put your mind to it." Spike teased, before catching Rarity's lips in a searing kiss, one that Rarity was eager to return. Her hands took Spike's in and encouraged him to explore her perfect body further, whether it was her perfectly shaped, round tits or her glorious ass, or her slender, powerful legs, it was one of Rarity's favourite things, reminding her Master why she was a cut above the rest of his slaves.

"Oh, I know, darling." Rarity purred, before her gorgeous sapphire lips planted kiss after kiss on his lips, whilst she lowered herself onto Spike's divine dick. "Or perhaps we should do it the other way around?"

With the Root of Magic flowing through her veins, Rarity used Queen Chrysalis's own magic to change her form. The perfect body of the diamond in his horde took the form of the voluptuous changeling queen, yet somehow Rarity wore the body better than Chrysalis did herself. The tiniest touches were improved on with Rarity's genius creative mind, little details often individually invisible to the naked eye but together made the slightest step towards her perfection. The improved body, Rarity combined with graceful body language that would send any man she desired wild. The glint in her eye, the sway of her hair as she rode Spike's cock, the way she squeezed his cock with perfect tightness. Never so tight that it hurt, yet still maximising every trace of pleasure she could mine.

"Perhaps we should invite Chrysalis here and show her what she could never achieve." Rarity purred, grinning with an almost wolfish glee. "Show her how a real woman, a real Mistress wields her body, her power and her very soul." She continued to slam her glorious black ass on Spike's cock, whilst she buried his face in her glorious tits, so much tastier than Chrysalis's tits. Fucking the Changeling Queen had been a treat, yet even the real deal couldn't possibly compete with Rarity. Who said you can't beat the original?

[Derpibooru: 3275376]

"Yeah, we fucking should at some point." Spike growled, seizing Rarity's new acid green nipples in his fingers and squeezing tight. "It'll drive her nuts, watching you use her body in a way that she could never hope to compete with. "She's too cocky, she needs to be taken down a peg."

"Maybe we could take her down together." Spike suggested with a wicked grin, his cock thrusting particularly deeply in Rarity's mimicked body. She gasped sharply, but they were sadly interrupted by a knock on the door. They didn't stop though, from the fact it was a special knock, they knew it was a member of their harem on the other side of the door. With a wave of her hand Rarity opened it, not dividing her attention from serving Spike's cock.

At the door, Luna entered, wearing quite the lovely dress that split around her breasts, granting a perfect view of her cleavage and sideboob. But, far more important to the Slutprincess of Whores, was how it hung deeply down the crack of her rear, giving anyone who saw her body a prime view of her most valuable asset.

"My dearest Master..." Luna cocked her head at Rarity who was still wearing Chrysalis's body. Luna seemed to notice a distinct difference in the Changeling Queen's body, somehow more perfect than it should be. She was quick to connect the dots though. "Has our Mistress taken the form of the Changeling Queen for any particular reason, other than all important the purpose of your pleasure?"

Blue flame engulfed Rarity's form, returning her to her perfect unicorn self once more, a coy smile traced her lips as she continued to ride Spike's cock with her glorious body. "Pleasure only, I'm afraid, my dear Slutprincess. But don't mind us, please share why you're visiting."

"Yeah, just let us fuck whilst you report." Spike grunted, as Rarity rode him with greater elegant grace.

"The Captain of the Royal Guard has returned from her tour of Equestria's thoughts." Luna explained, her lips curved into an ambitious smile. "Tempest Shadow wishes to give her report to my sister in person, and we imagined it would be the perfect opportunity."

"Right, Celestia mentioned she was the Captain of the Royal Guard in this new timeline. What's the story behind that by the way?" He asked, just as he gripped both of Rarity's perfect tits. The regal diamond could not stop herself from letting out a very unladylike moan.

"Fuck, like that, my Master. Take the tits of your diamond in your claws." Rarity squealed, taking his hands into hers and encouraging him to squeeze harder. Spike grinned and was eager to comply.

Luna took the fucking before her in stride, simply watching the display with the pride of a mother watching her children play, although this mother looked very much like she wanted to join in. "Tempest Shadow was appointed as leader of the Royal Guard after Gleaming Shield was sent to support the Slutprincess of Lust in the Crystal Empire. Officially, she was chosen because of her military experience, prowess in combat and knowledge of enemies like the Storm King."

Luna's serene smile turned to a wicked grin and a cheeky glint sparked in her eyes. "Of course, that's not the true reason Tia selected her. No, she knew that the Captain of the Royal Guard would need to be skilled, yes, but also loyal. And to be truly loyal, she must be your slave, and to be your slave, we needed a sexy mare. And who better than an Amazonian, dark mare with a huge pair of tits to wrap around your divine cock?"

"Celestia's got good taste." Spike grunted before cumming inside Rarity once again, another of the many times that Spike had shot his cum into his perfect diamond. He wondered if soon, her insides would be permanently coated in his cum at some point.

“Indeed, Master.” Rarity purred, trailing a finger alongside Spike's jaw. "I'd love to see Tempest Shadow's glorious ass bouncing on your cock Master. To see that stern, cold-faced bitch become your bitch.”

"Tia also believes that any smooth transition into your rule would require a guarantee of the Royal Guard's loyalty." Luna explained, kneeling down beside the fucking couple. Her glittering dark arms traced around her heaving breasts as if offering them to her dragon Master. "And for that, Tempest Shadow's loyalty is essential."

"Well then that's decided, but of course that's not the real question is it?" Spike said, grunting as he pulled his cock from Rarity. "The real question is how to enslave her."

Author's Note

I'm not surprised Tempest Shadow won, especially when I marked the three 'essential' characters to enslave until Canterlot is conquered. Tempest Shadow represents the Royal Guard, Bonbon represents SMILE and Spitfire, the Wonderbolts, the idea is that each one represents the military and intelligence of Equestria making Spike's conquest all the easier.

That being said I'm still pondering what angle would be best to go with for Tempest Shadow and how she should be enslaved, probably why this chapter is relevantly short. Ideally it’s something unique for her but as long as it’s interesting, I'll write it.

Any suggestions, feedback, and constructive criticism are welcome.

And special thanks to ShadowLDrago for proofreading this chapter.