The doors to the throne room crashed open.

Celestia watched coldly from her throne as King Sombra, the once-despot of the Crystal Empire, strode in, flanked on two sides by her own guards. They weren't in their right minds, of course; that much was made obvious by the green glow emanating from their eyes.

"Hello, Celestia," he said. His voice haughty, and mocking.

"King Sombra."

"In the newly-restored flesh."

Starswirl had been the one to alert the sisters that something was wrong—he'd told them when he burst into their chambers that he'd felt the Tree of Harmony cease to be.

Celestia had felt it too; she'd been connected to the elements as well, once. But she'd also felt the presence of something—or someone—else. So, while Starswirl and Luna had gone to investigate the Everfree, she'd remained in Canterlot, just in case.

It appeared she'd been right to.

Celestia stood, her long white dress swishing around her feet. Her horn began to glow like the sun. "Release my subjects and surrender at once."

"Hmm..." He made a how of considering the offer, tapping an iron-clad hoof against his chin. "No, I don't think so."

Celestia wasn't prepared to take 'no' for an answer. Whipping her head around, she launched a blast of pure heat at the tyrant king.

Sombra smiled as, in synchronized fashion, Celestia's own guards stepped in front of him, forming a living wall. Celestia's eyes widened; she dispelled the fireball just before it would have turned her ponies into ash.

"You're a coward, Sombra," she said through clenched teeth.

He just laughed. The guards fell back into their original positions.

"How about a counteroffer?" he said. "Submit to me and not one of your precious subjects will be harmed. Not even your loathsome student. Don't, and... well, I'm sure you can imagine."

"You've done quite enough harm to my ponies already," Celestia said. Still, she allowed her horn to go out.

"A wise choice, princess.."

Sombra's own horn lit, and a blast of magic shot out. Celestia flinched as it enveloped her, then sank into her horn, black crystals growing from its base a moment later. Her magic had been sealed.

Another flick of Sombra's horn, and a shadowy force took hold of Celestia's limbs. She was lifted into the air, arms and legs outstretched, wings pinned against her back.

"Leave us," Sombra commanded of his troops. "But don't go far. You know what to do if she tries anything."

His branwashed soldiers turned and shuffled off. The door to the throne room shut behind them. Celestia and Sombra were the only ones left in the chamber, now.

Celestia glared down at him from the air. The sight just made Sombra laugh.

"Poor, poor princess of the sun," he said. His magic brought her closer.

"This is pointless. Twilight and her friends will defeat you."

"And how is that?" Sombra said. "I've already destroyed their precious Elements of Harmony!"

"Don't underestimate my student. She can be very resourceful."

"Oh, I'm sure," Sombra said. "But in the meantime..."

He floated her down, so that she was even with him.

"I have some revenge to take care of. A thousand years' worth of revenge."

"What are you planning?" Celestia growled. "To show me my darkest fears again? To try and turn me into another one of your soldiers? Your magic won't work on me, Sombra. I've seen your tricks before, and I will never betray my ponies to you!"

"Oh Celestia, you wound me." He cupped her chin, forced her head up. She continued to glare at him.

"I would never turn you into just another soldier. You're far too valuable," he said. "No, I have much better things planned for you."

He released her chin, let his shadows lift her back into the air.

"You won't be serving in my armies, no," he said, gleefully. "You'll be leading them! I'm going to forge you into my loyal knight-commander, Celestia. For sealing me away all those years ago, I'll make you conquer the very ponies you've worked so hard to protect."

Celestia's cold stare wavered only for a moment. "And how do you plan on doing that? I told you already, your tricks won't work on me."

"I'm so glad you asked, princess."

His horn glowed. A shadowy portal appeared beside him. From the shadows emerged pieces of metal—a suit of armor.

"Every knight needs a set of armor," he said. "This will be yours. I've enchanted it just for you—and each piece will bend you further to my will."

"And how do you intend to make me wear it?" Celestia asked, eyeing the armor.

"By putting it on you myself, of course."

His horn glowed, and the dress Celestia had been wearing burned away, leaving her naked, defenseless, and totally at his mercy. Now, she was beginning to look worried.

He licked his lips. "And I am going to savor every moment of it."

The first piece of armor floated over to her, propelled by the red aura of Sombra's magic. The tendril of shadow that was holding her right wrist guided her arm forward to receive it.

The piece of steel settled onto her forearm. The cold metal pressed into her skin as the straps tightened, locking it in place. Celestia shivered.

She examined the thing as best she could from that angle. It was clearly steel, but it seemed more decorative than practical; it only covered the outer part of her forearm. Sombra had clearly modeled it after his own.

As she watched, however, she began to feel a very strange sensation, where the metal touched her skin.

Something was moving.

She gasped as something began pouring out from beneath the metal plates. A thick, shiny liquid the color of Sombra's coat began flowing across her arm, enveloping it in a smooth, latex-like material. It spread downwards, flowing on its own down her fingers and wrapping around them until her hand was completely encased.

Where the latex clung to her skin, she began to feel... sensitive. Raw. Heat began to build in Celestia's cheeks. What was happening to her?

"W-what is this?" she demanded.

"That is a construct of pure dark magic," Sombra said, as he levitated another, identical piece of armor from the collection. "My dark magic. And it is going to make you mine."

The new piece floated up and was affixed to her left arm. Celestia shuddered as she watched the same process begin again, her pristine white coat disappearing under the rubbery substance, that same feeling of sensitivity following it. Soon, both of her arms had been encased up to the elbow, giving the impression of a pair of latex evening gloves.

There, the substance stopped. Celestia could feel her heartrate increasing, her breaths quickening. Why?

The next pieces were a pair of grieves. They affixed themselves to her legs, first the right, then the left, buckling themselves in place. Like the pieces on her forearms, these were quite minimal—and after a moment, the magic began oozing out from them.

It trickled down, slowly consuming her. She shuddered as it crept over the soles of her feet.

Celestia began to feel a pressure against her mind—and a warmth in her nethers.

"Are we enjoying ourselves?" Sombra asked her mockingly, as a new piece—a pair of shoulder guards, spaulders decorated with spikes, was lifted up to her. "I imagine you must be beginning to feel the effects of being encased in the physical manifestation of my will."

Her eye twitched. "I will resist," she stated, through clenched teeth.

"You can try," Sombra said, mirth in his eyes.

The shoulderpieces fell onto her, strapping themselves down. Their weight felt... good. As before, Sombra's latex skin began pouring out, down her arms. Where it met the rubber on her forearms, the two merged, forming a seamless bond.

Celestia bit back a moan. She could feel it now, tantalizing her. Pushing on her consciousness, whispering on the edge of her hearing. The heat in her nethers grew hotter as her sensitized skin betrayed her, the weight of the armor pushing on them enough to send waves of pleasure through her with every slight movement.

Next came a pair of cuisse, which pressed against the upper half of her legs. The sudden cold in so sensitive of an area made her gasp, leaving her totally unprepared for the sensation of the straps binding against her thighs.

She let out her fist moan as the latex began dripping down the insides of her thighs, squeezing them, taking an already sensitive area and increasing it tenfold. Just like before, where it met the rubber around her knees, it joined seamlessly.

Celestia watched as the golden sun of her cutie mark, a symbol of peace and hope to all the ponies of Equestria, was the last thing to disappear under the latex as her legs were completely encased in Sombra's magic.

She hung there, panting. The pressure in her body was building; the gentle squeeze of the latex against her skin, the tight pinch of the straps, the weight of the armor, all of it combined into one great, overwhelming sensation of pleasure which assaulted her will. Still, she fought to resist its pull, and for now, she was winning.

But Sombra wasn't finished yet.

"Only three pieces left, Celestia," he gloated. "How many do you think you can take before you break? One? Two? I guarantee you, you won't last through all three."

Celestia said nothing, just grunted.

Sombra laughed. His magic took hold of Celestia's head, forcing it up, exposing her neck for the next piece of the armor.

"I think you'll like this one," he said, as he lifted up a shaped metal collar, a gorget, similar to his own. It hinged at the front; with a devious smile, he clasped it around her neck, tightening it down around her throat.

His magic released her head. The collar was slightly articulated—she could still breath, and it offered her some movement—but it forced her head up and her gaze forward at attention.

She shuddered as the magic began to pour out, sliding across her collarbones and melding with the coating on her shoulders. It stopped just above her breasts. Her torso and her head were the only parts of her body not yet encased. Her exposed cunt was damp; her fluids dripped onto the stone floor below.

Celestia bit the inside of her lip, hard enough to almost draw blood. She had to hold on. There was no other option.

Then she felt the metal press against her chest.

Sombra smiled wickedly as he fit the breastplate onto her. Like the other pieces, it was minimal—it fitted well to her form, but its pointed edge stopped just above her navel, leaving her stomach and hips exposed. That wasn't all, however.

A pair of carefully molded cups slipped under her breasts, supporting them and pushing them outward. She gasped as the metal's cool surface rubbed against her perked nipples. It fit her perfectly, like it had been made for her.

Celestia knew what would be coming next. She just wasn't prepared for how strong it would feel.

The gray latex began pouring out. It surrounded her breasts in a matter of moments, and she bit back a scream as their sensitivity spiked. She began to squirm as it flowed over them, pressing into them, squeezing them, but each movement only increased the waves of pleasure crashing against her mind. It flowed up, joined the collar.

But that wasn't all.

The latex began to flow down, down her sides, across her thin, delicate waist, and her eyes widened. It joined with the material encasing her hips, kept going, spreading down and down further until—

Now, Celestia screamed, throwing her head back as far as the collar would allow as the cool latex flowed over her clit.

Sombra's laughter was cruel as the rubbery material slid over her crotch, over her puffy, needy lips, already slick with their own fluids. Celestia squealed as new, impossibly intense sensations bombarded her. She had no control now; she twisted and spasmed under Sombra's hold as the latex continued to flow over her marehood, each jerking movement only adding to the pleasure that wracked her body, flooded her mind.

After what felt like an eternity, the latex completed its journey. It had molded itself to her perfectly; every feature of her body was plainly visible. Her new skin was complete.

Celestia was given a moment of respite as the magic completed its work. She hung from her magical bonds, panting, gasping for breath, her chest heaving. Every inch of her body ached with want under the latex's touch. She could barely think straight. A line of drool dripped from her mouth.

But the torment wasn't over.

"You've done well to hold out this long," Sombra said. "You impress as always, Celestia. But there's still one piece of armor left."

Despite the sensations which swept her body, Celestia forced her gaze up.

It was a helmet.

Not like the other helmets, the ones Sombra had used to enslave her ponies, no; this one was ornate, and sculpted. It was lighter than the others, left less of the face covered. A metal visor hung over the eyes, and at the top was a hole to accommodate a horn.

Celestia got the impression it had been designed especially for her.

"N-no," Celestia forced herself to say, as the helmet came closer. "Please... don't..."

The helmet paused, just above her head.

"The mighty Celestia, begging me for mercy?" Sombra laughed. "Oh, this is a moment to savor."

Then, slowly, the helmet began to descend.

Celestia tried to wriggle away from it, but magic grasped her by the temples and held her firmly in place. She could do nothing as it was lowered over her horn.

The visor covered her eyes, and she could no longer see. Her mane was swept through an opening in back of the helmet as it settled against her skull.

Her vision was flooded with green light.

Celestia felt her new, rubbery skin begin to move, shift. She moaned as it began to flow once again, over every inch of her body, caressing it.

The latex around her marehood rippled as the walls of her cunt were spread apart. She could feel herself leaking into the suit. The moment seemed to hang forever, until...

She screamed again as Sombra's magic began flooding into her, her eyes rolling back in her head beneath the visor. It pressed up, up, further, thoroughly violating her as it began to fill her, taking possession of her inside as well as out. She could feel it, reaching, seeping into her, corrupting her very being.

Her back arched against her restraints. Her mind short-circuited, unable to bear any longer the immense pleasure that assaulted it. Any will she had left to resist was swept away in the flood of pure ecstasy that rushed through her, wave after wave after wave. She came, her juices spurting out through the suit, dripping into the puddle that was already spreading across the floor.

Green light bored into her eyes. Voices whispered on the edge of her consciousness, telling her her role, her place, who she was loyal to. Telling her to obey. Her mind, fractured into pieces, took their words as gospel, let them put her back together, better, stronger, as her body came and came again.

Sombra watched as she endured the throes of her lust, until at last the armor finished its work. Her body fell limp in his magical grasp.

He released her, lowering her to the floor. She fell to her knees. Well, that wouldn't do.

"Stand up!" he ordered.

Dutifully, immediately, Celestia stood, her arms stiff at her sides, her back straight, her head forced forward by the collar.

"Salute!"

Celestia's right hand snapped to her forehead.

Grinning maniacally, Sombra's horn began to glow. His aura surrounded Celestia's helmet; he lifted it off of her.

The alicorn's eyes were pools of pure green. A purple haze drifted from their sides. Celestia held her pose obediently, no sign of emotion gracing her face.

He had won.

"Who are you?" he demanded of her.

"I am Celestia, your loyal knight and commander of your forces, my king."

"And who am I?"

"You are my king, my king. Your will is my will."

"And any who oppose me?"

"Will be made to kneel at your feet, my king."

His laughter echoed off the walls of the chamber. Celestia held her salute.

Satisfied, he replaced her helmet. The crystals in her horn disintegrated. She made no signs of noticing.

"Kneel before your king, Celestia."

Dutifully, Celestia dropped to one knee at his feet, bowing her head to him.

Sombra cackled. "Yes! Finally, Celestia, your power is mine! The very mare that sealed me in the ice over a thousand years ago is now my sword to command. The most powerful alicorn in existence obeys my every order! None will be able to oppose me now. Oh, what will poor Twilight Sparkle think when she sees that you obey me? Or that pesky sister of yours? Forget the Crystal Empire! Forget Equestria! Soon, the whole world will be—"

Snrkt.

Sombra paused. Blinked.

"What was that?"

Snort.

He looked down at his conquest. She appeared to be shaking.

"What is the matter with you, slave?" he hissed.

"Snrkt—Pffthahahaha!" his newest slave laughed, doubling over at his feet. One of her latex-clad hand slapped the ground.

Sombra watched, unable to process what was happening.

"Oh," Celestia said, even though he had not commanded her to speak. She began to stand, chuckles still escaping her lips. "Oh, it's always the monologue that gets me. Every time. You're so predictable, Sombra."

"W-what is this?" King Sombra demanded.

Celestia lifted the helmet off of her head. She was smiling, and her now-revealed eyes were pure and free of his magic.

"I'm sorry, it was just too funny," she said, letting the helmet hang from her fingertips. "Did you really think that would work? An enchanted suit of armor? Sensitivity-increasing magic? I've been around for millennia, Sombra, you're going to need to do better than trinkets and cantrips if you want to best me."

She looked down, twisting her waist around so she could inspect herself.

"I do like this armor, though," she said. "Can't say iron is really my color, but I can always get it plated. Hmm... You know, I never could understand Luna's fascination with latex, but I think I'm starting to see the appeal."

She trailed a finger up her crotch, tugging at the shiny material that covered it, and mewled.

"Mmmn, oh yes. Definitely seeing the appeal." She sighed. "Of course, it probably wouldn't do Twilight's mental state much good if she saw me wearing your uniform, so that'll have to wait until later." Her horn glowed, and with a flash, the armor teleported away, and an elegant dress appeared in its stead. "That girl has enough on her plate as it is."

"This is impossible!" Sombra cried. "I had you kneeling at my feet!"

Celestia gave him a look filled with mirth. "What is it about 'millennia-old alicorn' that you're having trouble grasping, Sombra? The millennia part? Or the alicorn part?"

"Your magic was sealed!" he insisted. "You were at my mercy!"

"Oh, hardly. I could have broken out any time I wanted," Celestia said. "Not that I was ever in any real danger. After all, Twilight and her friends are going to be here in about, oh, twenty seconds?"

"Then you were just toying with me!?" Sombra growled. "This whole time!?"

Celestia laughed again. "Of course I was, Sombra. Honestly, I'm surprised you didn't catch on for how little of a fight I put up. I mean, really, I sealed you away beneath the ice of the frozen north for over a thousand years the last time we met. You'd think that would have been a dead giveaway."

"Why?" he demanded. "If you could have dealt with me so easily this whole time, then why the playacting!?"

"Oh, it's quite simple, really. Two reasons. The first is that Twilight really needs the confidence boost from defeating you if she's going to become the wonderful ruler that I know she can be. Two..."

Entwining her fingers behind her back, she leaned in towards him, playfully whispered into his ear.

"Because being the object of someone else's conquest gets me very, very wet."

She drew back, just as the door to the throne room slammed open. Twilight and her friends barged in, right on cue.

'Until next time,' she mouthed, as she stepped back to enjoy the lightshow.

As Sombra was once again banished to the void, amidst the rainbow light, he couldn't help but wonder who exactly had violated who.