Twisting Twilight

On the other side of the portrait, Nightmare Rarity was having the time of her life. Twilight still couldn’t help herself but drool over the creamy cavern of unicorn cleavage. She had to be restrained in a bubble of Nightmare Rarity's overwhelming magic, and even then Twilight struggled to break free so that she could **** the generous rack. She was no match of course against the power of the Root of Magic and was effortlessly restrained.

"Ah-ah-ah darling. I know you would like nothing more to **** this perfect body of mine, but not yet... no not until you do one thing for me."

"Anything Mistress."

"Let me into your mind, let reshape you from the ground up. There is always a thrill to seeing your mind as putty in my hands," Rarity ordered her, eyes flashing with wicked delight. Desperation spread across Twilight’s face, and the need to get **** Nightmare Rarity’s glorious tits overshadowed any need to maintain whatever facade of free will she had remaining. Rapid nods were the only answer she could give.

Nightmare Rarity let her magic drop, and a purple blur dashed upon her chest. The hero who had saved Equestria was now pawing at the unicorn’s chest, her nightgown was torn with animalistic savagery. Twilight’s tongue rolled around the diamond nipples of Nightmare Rarity’s bust, suckling them like a newborn infant.

Any mental defences that Twilight had left were in broken disarray, overwhelmed by a haze of lust and desire. Whatever was left easily allowed Rarity into the core of her mind, if she wanted she would be able to rewrite Twilight into a drooling, idiot bimbo but she had something else in mind.

Nightmare Rarity’s horn lit up with the same spell she had spied Chrysalis use earlier, albeit far more powerful. The once organised and intelligent mind of the princess gave way like dust gave way to the wind. She easily pushed into the deepest levels of her mind. The Root of Magic combined with Twilight’s willingness left her little more than a puppet for her to ****.

Completely in control of the situation, Nightmare Rarity finally returned to her real form. Midnight black fur rolled down what was previously an alabaster white. Her purple mane exploded into an ocean of celestial curls that mirrored the night sky down to the most perfect detail as her nails turned to a diamond blue.

"Look upon me Twilight and tell me what you see," Nightmare Rarity asked, cupping Twilight's hypnotised eyes into hers. She could feel Twilight trembling under her touch, and when she spoke she could see Twilight's eyes droop off as if falling asleep. Despite this though Twilight was able to bring herself to look into Nightmare Rarity's eyes.

"You're-you're Nightmare Rarity," Twilight gasped, her voice trembling as if she was resisting the active urge to avoid falling asleep. Nightmare Rarity heard a soft gasp from whom she assumed to be Twilight as she rolled a perfectly manicured hand through her hair.

"Yes darling I am, I apologise for the deception but surely you can understand. After all, you wouldn't have let me into your mind otherwise," Nightmare Rarity said, with an evil grin. Twilight's head was slowly rolling around as if trying to break the unicorn's hold but it was all in vain.

"Don't bother resisting little girl. After all, I am a part of Rarity. A part of your all so precious Mistress, you owe me your loyalty correct just as you owe her your loyalty right?" Nightmare Rarity asked Twilight whose head was rolling slowly from side to side, even as her hands still pawed Nightmare Rarity's tits.

"N-no can't... I-I'm loyal to Mistress Rarity," Twilight squealed, fighting her control in a vain attempt.

"But I am your Mistress Rarity, I even have the Root of Magic to prove it. I'm her, just with an even more beautiful body and fantastic tits,” she declared, angling herself so that her bust was placed ever deeper into Twilight’s grasp.

“Do you love my tits Twilight?” Nightmare Rarity whispered into her ear, hearing soft mewl moans. “They’re better than my other self’s aren’t they?”

There was a whimper from the alicorn student as if she was afraid to speak. A hand came crashing down on her flank. “I asked you a question slut.”

“Yes…yes your tits are perfect. They’re so much better than Mistress Rarity’s,” Twilight cried out with tears rolling down her cheeks as if she was committing some great act of blasphemous statement. That thought gave Nightmare Rarity a great idea, however.

"Indeed they are, and so is my body and my mind. Let that truth seep into you, let it reach into the deepest, darkest part of your mind. Rewrite yourself from the ground up with that unassailable fact in your mind. I am better than Rarity. Repeat it.”

“You-you are-“

“I am better than Rarity," Nightmare Rarity iterated.

"You are better than Rarity."

Triumph flooded through Nightmare Rarity's body, as Twilight confessed her superiority over her other counterpart. One giddy hand let go of Twilight’s face and made its way down to her own quivering snatch. She couldn’t hold herself back any longer, the need for self-pleasure was now impossible to resist.

“Again.”

“You are better than Rarity, you are better than Rarity, you are better than Rarity,” Twilight chanted, a mantra that became ever more pronounced and clear every time she uttered it.

“She is not your Mistress. I AM!” Nightmare Rarity shouted, her mouth stretching into a wicked smile, only to falter with Twilight’s next word.

“Rarity,” she **** out as if ignoring her every instinct to say otherwise, “is my Mistress.”

“I am your Mistress,” Nightmare Rarity growled but Twilight was shaking her head.

“Rarity is my Mistress, Rarity is my Mistress,” she chanted almost in a panic, clinging onto that thought with all the mental energy she had left. The dragon's control over her was strong, even if Nightmare Rarity loathed to admit it, but maybe there was another way.

"Alright then Rarity is your Mistress, but I am something more than that," Nightmare Rarity said, redoubling her efforts and her magic into Twilight's mind. Looking for the path of the least resistance.

"More than that?"

"She is a Mistress but I'm your Goddess. Think of how powerful I am, how beautiful I am, how perfect my tits are," she whispered into Twilight's ear, her dark scent drifting into the young student's nostrils making her go weak in the knees. Twilight was utterly unable to resist being **** upon her tit, a bright blush spreading across her face as she sucked.

"My Goddess," she murmured though muffled by the breasts she was obsessively suckling.

Nightmare Rarity pulled Twilight off of her breasts, wanting to hear her now. "You worship me, the ground I walk on, the air I breathe, you worship it all. You are my servant and I am your Goddess."

Twilight's eyes sparkled as if she was in the presence of a god, and her body trembled as if she was in front of Celestia's wrath. "M-my Queen."

"Your Queen? I rather like that, though I'm rather more than that, I'm a Goddess, your Goddess. You worship me, I am the epitome of grace, of power, of beauty and you worship all of it," Nightmare Rarity whispered into her ear, hands now roaming all across the pliable Twilight's body.

"Yes I worship you, my Queen," Twilight muttered, as gasps and moans escaped her lips from Nightmare Rarity's molestations.

"More than your Mistress?"

"I-" Twilight paused but this time Nightmare Rarity was ready.

"A Goddess must be worshipped Twilight, far more than a mere Mistress. She is mortal and I am divine, you must serve me above her, and if you worship me then I can bring her to heel and make you both serve me. That way you can serve her as well as me but only if you worship me," Nightmare Rarity growled, digging her fingers into Twilight's cunt and breaking what remained of her resistance.

"Yes, my Queen I'm your servant. I will serve you even more than my Mistress and my Master," Twilight proclaimed causing Nightmare Rarity to light up in celebration.

"At my command, you will use your Root of Loyalty on your Master's harem. You will make it so that loyalty in the harem is replaced with loyalty to ME! And that idea will spread until all of Spike's power is MINE!" Nightmare Rarity declared with unabashed glee. Finally, her plans were coming together.

But unbeknownst to her those plans were being revealed as Cadence was still on the other side of the portrait and had heard every word.

A/N: Don't worry folks Twilight won't remain this way forever. Thanks to everyone's suggestions as to what to do with Nightmare Rarity, I now have an idea of what I want to do with her now, but I could still pivot if someone provides a really good suggestion.

Also, like the new Avatar? She's the commission I got from Nauth and should be making an appearance in the story as Cadence and Spike's daughter.

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