Rainbow, like Pinkie, wasn't dressed up, lest all her various parts not be exposed. She was weakened by magic, so they didn't even bother to tie her wings to her back. She could barely manage to lift them, much less take off. This didn't keep her from resisting, refusing to walk where they wanted her to go, and in the end being literally dragged to the other dungeon cell. It wasn't that far from where Twilight's other pets were being held, as Twilight wanted them to hear her screams.

The cell she was dragged to was a special one. Aside from the standard stone walls and floors, and chains hanging from the ceiling, it contained a large stone pit, wide enough for several ponies to stand in and deep enough that an average-sized mare could barely keep her head above the surface. It wasn't filled with water though; the room was filled with the stench of the boiling hot oil, fumes rising up from the liquid and floating up through a hole in the ceiling.

Mockingly, Twilight wore a spandex Wonderbolts flight suit, covering almost her entire body from the neck down save for the unzipped portion that allowed her best bits to be accessible. As she dragged Rainbow Dash into the cell, the pony was clearly trying to bargain.

"No no," said Rainbow, "I could be a real asset, don't you see? I can... I can rainboom your enemies! Please Twilight just think, can we at least wait while you think about it?"

Twilight just chuckled and shook her head as she pulled Rainbow into the room. Rainbow Dash was about to continue, but was stunned as she looked into her new cell. Not at the chains or the hot oil, but at Spitfire, who was standing patiently next to said oil pit and waiting for Rainbow to arrive. She wore her full uniform on her upper torso, pins and all, but of course left her bottom half bare. Not surprisingly, she had been futa-ed by Twilight and was sporting a nicely sized chunk of meat.

"There you are Spitfire," said Twilight, "Oh and in uniform, I love a mare in uniform."

"Hello Queen," said Spitfire, "And sup newbie. Enjoying your stay Dash?"

"W-what are you doing here?" said Rainbow as loudly as she could, which wasn't too impressive, but at least she was walking on her own now, "I... I expected Lightning Dust or somepony that hated me."

"I only like you in public, Dash," said Spitfire, "The fact is, you're TOO good. If you join the Wonderbolts, you'll end up replacing me in a few short years, and I'm not ready to give up my top spot yet."

"But... but... you're my hero," Dash started to tear up, then finally noticed the main attraction in the room, "Wait... what's that boiling stuff doing here?"

Spitfire and Twilight laughed together at Dash's statement, but neither thought it was worth a direct answer. Rainbow knew what the boiling stuff was for, even if she desperately wanted to be wrong.

"So, did you want to warm her up?" asked Twilight, "I'd like to see that cock I gave you in action."

"You said I could do her in the oil right?" said Spitfire, "That you'd protect me, so if you can do that, no point in waiting."

"Good point, let's go ahead and dunk her." Twilight smiled.

"Dunk me?" asked Rainbow, "No! No seriously I'll join the castle guard instead of the Wonderbolts, I won't get in your way Spitfire, I swear!"

Rainbow resisted with renewed vigor, immediately trying to run but instead falling flat on her face. Twilight used her magic to drag the pegasus back to the pit, then slowly moved her to float over it. She started to shiver violently in fear, feeling the fumes wash over her body as they rose. She screamed 'No' and awful lot of times as Twilight began to wrap her in chains. The wrapped three around body, front, back, and midsection, which was plenty strong enough to keep her suspended. Twilight then casually floated another chain over to Spitfire.

"Go ahead and lower it as fast or slow as you like, Spitfire," said Twilight, "Meanwhile..." Twilight walked about Spitfire to her rear end, and nuzzled about her slit and the back of her balls, "Mind if I warm you up?"

"Huh? Go ahead, long as you're not planning on putting a foal in there," said Spitfire.

"Oh no," lied Twilight, "I can keep myself from doing that, no need to worry."

Spitfire spread her hind legs, pushing her hips slightly back as Twilight mounted up behind her. Placing her tip to Spitfire's entrance, she pushed forward to sink between her wet lips and slide into her body. Spitfire began to roll her hips back against Twilight, and the alicorn obliged by thrusting in return, panting as she relished watching what Spitfire would do.

A grin on her face, Spitfire began to slowly let Rainbow down, watching her hooves inch towards the boiling pit. Rainbow panicked, her wings flapping weakly and form struggling within her chains. She gritted her teeth, putting all her remaining strength into pulling her four hooves upwards to prevent them from going into the oil. Yet it still continued to rise, and was quickly approaching a point where she couldn't pull her hooves up any higher.

"Spitfire no," screamed Rainbow, tears streaming down her face and dripping into the boiling oil, "Spitfire! I... I love you!"

"Yeah I figured you were a dyke," Spitfire rolled her eyes, "It doesn't matter anyway, because I hate you, the annoying self-righteous bitch that you are."

Before Rainbow could respond, her quivering legs finally dropped into the oil as she couldn't hold them any longer. They plopped into the oil with a splash, and Rainbow Dash screamed as the pain shot upwards through her hooves and shook her body. She immediately began to thrash, splashing oil all over the place, but the drops that struck Twilight and Spitfire only felt pleasantly warm due to Twilight's magic.

"Yeah that's hot," Spitfire grinned, clenching her pussy about Twilight and rolling her tunnel up and down the throbbing length, "In more ways than one, time to take the plunge."

Spitfire pulled the chain again, letting Rainbow drop suddenly until her belly was touching the surface, and watched the hot steam searing at the fur on her belly. Rainbow arched her back, trying everything she could to lift her body just a little higher, then let out another blood curling scream. She tried to speak again, to beg, but only sobs came out whenever she tried to speak.

Rainbow was dropped several more inches, just high enough for the searing hot fluid to be half-way up Rainbow's soft, sensitive cunt, making her twist and roll her hips to try to avoid the touch. Spitfire moved closer to the pit, pulling Twilight with her, and propped her chest against the edge so that she could reach her hooves inside. She used them to pull Rainbow's cunt lips apart as far as she could, and watched with delight as the oil flowed inside Rainbow's most sensitive part.

After giving her pussy a mocking rub, Spitfire returned to the chain and pulled her down further, the fluid rising against her body slowly but steadily. Her skin reddened, becoming raw, and her fur began to come out in clumps as her lower body boiled. She tried hard to push the oil from her cunt, but only managed to slosh it around inside of her, her baked labia hanging apart still where Spitfire had pulled it. Soon it began to leak into her ass as well.

"Oh that is so fucking hot," said Twilight, rolling her eyes back. She slammed her hips forward into Spitfire's fuck hole, which convulsed in delight around her as Spitfire went over the edge, splattering fluid back over Twilight's swinging ballsack as she came. Twilight couldn't hold herself after that, flooding her rape buddy with thick, fertile seed, packing it in deep to make sure it would take. She then pulled out of the impregnated pegasus and strolled over to the edge of the pool, drooling cock swinging beneath her.

Rainbow was up to her neck at this point, and the chains fell loose about her as her hooves finally hit the bottom of the tank. Rainbow tried to hold her wings up above her, but she was ridiculously weak, and all she served to do was to unfold them so that more oil could burn her feathers away. Soon she only held her chin and face above the top, her eyes wide with unthinkable agony.

"Go ahead and climb in," said Twilight, "The water's fine."

Twilight climbed into the pool with a splash, the fluid washing warmly over her body, making her uniform stick to her flesh even more than before. The heat shield held, shimmering around her as she moved through the fluid. She walked up to Rainbow's front end, rubbing the bottom of her chin with a hoof and leaning forward to kiss her deeply. Rainbow returned a groan of agony as Twilight lapped within her maw.

Spitfire took a moment to work up the bravery to splash into the oil as she watched Rainbow boiling in it. Once she did, she seemed to enjoy the warmth as well, body shimmering and uniform sticking to her chest. She immediately went around to Rainbow's other end, looking her over through the semi-transparent gunk. She rubbed a hoof along her back, feeling fur and bits of skin come off her body.

Twilight playfully pushed Rainbow's head under the surface, feeling her struggles return anew as the oil baked her face. She desperately held her breath and tried not to get any oil in her maw, but that was ruined as Twilight pried her muzzle open. Rainbow managed not to breath any of it in, but she couldn't stop her gag reflex from swallowing the burning fluid into her, filling her stomach with unbearable heat.

Spitfire didn't seem concerned with Rainbow's predicament up front. She was much more interested in her behind. She pulled herself up into a mounting position, rubbing her front hooves over Rainbow's wings in the process, and pulled her throbbing endowment up until the tip pushed against Rainbow's ruined fuck hole. Spitfire moaned, finding that the head had actually tightened the flesh of Dash's tunnel. She plunged in and began to thrust, rubbing into charred flesh as she felt it continually convulse around her cock.

"That's right," groaned Spitfire, "Suffer you burnt cum bag. Fuck, this is amazing."

Twilight smirked, finally letting Rainbow's head up after over a minute of holding her breath. She spit out oil like a water fountain and then took in a large breath into her burning lungs. She gagged and screamed, her charred tongue now hanging loosely out the side of her muzzle. She had little time to rest before Twilight pulled herself up into a mounting position on Rainbow's front end, her agonized mouth and throat suddenly invaded by the throbbing length, which chaffed against the ruined flesh.

Spitfire sped up her motions as a cloud of red formed in the oil about Rainbow's nethers. She moaned more loudly as she hammered away, her thick swollen balls near to flooding Rainbow at any second. Still, Spitfire tried to hold it in, wanting to feel Rainbow's squirming, suffering body against her as long as she possibly could. The feel of her throbbing cock in an unwilling hole was amazing enough, with the constant spasmed running through Rainbow's body on top of that.

Twilight ran her hooves over Rainbow's head, then used her magic to yank the remainder of her mane out and let it float about the pool. She then gripped her head tightly in both front hooves and began thrusting wildly. Rainbow's head was pulled beneath the surface with each thrust, having to strain to keep her breath held on one part of the thrust and try to get a little air when her head was pulled back. It was amazing that Rainbow even wanted to live at this point, but she was nothing if not stubborn.

Meanwhile Spitfire ground her hooves against Rainbow's wings. The last of her feathers were boiling off her flesh, so Spitfire rubbed hard across the fleshy part of her wing, tearing her skin to shreds until barely any flesh held her wing bones together. Rainbow's body began to shake violently beneath her, causing her to loose herself within the thrusts, and she blew her hot and heavy load deeply into the destroyed womb, cum mixing with hot oil in little white swirls, then fading into the red. Spitfire squealed in delight, continuing to thrust for another full minute, unable to keep her balls from ejecting more sweet sperm.

Twilight was soon after, blowing her load into Rainbow's belly, burning cum actually soothing her insides slightly, so Rainbow guzzled it greedily. Twilight moaned at the feeling of the throat around her, continuing to pump more and more as she held Rainbow's head under the surface again. She finished her orgasm and relaxed, and was sorely tempted to keep Rainbow's head under the surface until she died. She barely kept herself from doing so, finally allowing Dash to raise her head again, sputtering and drawing in painful breaths.

"That was relaxing," panted Twilight, looking across at Spitfire as she pulled out.

"Fuck yeah," said Spitfire, pulling out of Rainbow's other end, shivering in afterglow as she pulled herself out of the pit.

Twilight did the same, and they relaxed by the pit for some time. Giving Rainbow another good fifteen minutes to simmer, they finally hoisted her out of it. Her body was completely ruined, all her fur and half her skin missing, blood drooling profusely from every hole she possessed. The flesh on her wings clung loosely to the bone, anything near air worthiness removed forever. She collapsed on the floor as soon as she was released from the chains.

"Mmm," said Twilight, "She looks delicious. She'll require some serious magic to keep her from dieing, but we should be able to graft enough skin on her that she can still be a slave for you."

"Cool," said Spitfire, "I'll have her work the grounds so she can see us practice and always be reminded of her pathetic, crushed dream... maybe I'll put a foal in her if you can fix her enough. I wouldn't mind raising a cross between me and her, would be fuckin' awesome."

"Oh don't worry, I'll fix the necessary parts," said Twilight, "And only two more ponies for me to take care of." She grinned, thinking of what was to come.