CHAPTER ONE: "Hey Twi can you fix my book?"

Twilight sat alone in her crystal study surrounded by books enjoying a cup of tea. Sitting legs crossed with a massive tomb the size of her purple thighs. Equestria was at piece, Spike was visiting Ember in the dragon lands, Starlight was running the school, she had no schedule for today aside from light reading. This was the life. Twilight took a sip of her hot tea and let it go into her magic carrying it onto the table. In her hand was Crimson Gladio's Art of Modern Equestrian War. To most ponies it would have been a very dry read, given Gladio's tendency to overly describe things and the fact certain words were in old ponish. But for Twilight Sparkle his detailed account of the Centurions march on Old Canterlot was utterly enrapturing. The strategies he employed were genius in his time, and held up were someone to attack an entrenched mountain position. Crimson's forces were on the offensive pushing the barbarians from there old capital. Crimson leading from the front neck deep in gore and holding up his shie--

Twilight's study door slammed open and Rainbow Dash sprinted in, hooves clopping on the crystal floor. "Tri!" the flier announced raising her hand. Twilight tried to ignore her and instead focus on the story as Crimson raised his shield to bloc--

"TWIIIIIIIIIIIIIIIIIIIIIIIIIIIIIGHLIIIIIIIIIIIIIIIIIIIIIIIIIIGHT" Dash drawled in an annoying voice trying to get her attention as a hammer came down on the golden shield forged by Crimsons father Brass Spear to help him in his mission to kill the dragons of the northern waist land tha--

"Twi. Twi. Twi. Twi." Dash repeated over and over the hammer smacking down again and again and again on the bronze shield tarnishing the symbol of Brass's cutie mark emblazoned on the front of Crimson's shield. This would not stand the brute would pay for defacing the symbol of his fathers honor that he got from his time in service to the Imperium at the --

Dash started waving her hand in front of Twilights face blocking her view as blood spilled fro--

"Hey Twiiiiiiiiiiiiiiiiii--"

Twilight slammed the tomb closed kicking up dust in Rainbow Dash's face. Causing the rainbow maned pegasus to cough, and fall on the ground."

"What do you want Rainbow Dash?" The alicorn princess of friendship asked clearly annoyed at being interrupted at the middle of the climax of the story.

"oh hey Twi." Rainbow waved sheepishly from the ground. "Can you fix my book?" Rainbow held up a copy of Daring Do book 12 with the cover missing.

~~~

"Please!" Rainbow whined to pulling of Twilights arm.

"PLEEEEEEAAAAAAAASE!"

"Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please,Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please,Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please,Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please,Please, Please, Please, Please,Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Please, Ple--"

"Alright!" Sparkle finally relented to Dash's whining.

Twilight slammed her book down right next to her tea. Because of Dash she missed the last three chapters and now had to reread them. Dash hugged Twilight bringing there breasts together in a manner that made Twilight feel very uncomfortable. Not that Dash seamed to notice or care. "Thanks Sparkle! Your the best princess in all of Equestria!" Dash's compliments made Twilight slightly uncomfortable. Finally Dash let go of Twi and handed her the Daring Do books with the ripped off cover. "Where's the cover Dash? I have some tape we can use."

The blue flyer blushed at this and scratched the back of her head. "I.. kinda… lost that part?" Rainbow admitted.

"How?" the princess asked.

"I was flying and reading again--." Twilight face palmed. "--And I got distracted and... well... dropped it... over the Everfree Forest." She finished lamely.

"I told you to stop doing that."

"Can't you... you know. Cast a spell or something to get it?" Twilight shook her head. "There isn't a spell for that." Twilight answered." Can't you look?" Twilight started laughing and pointed to her cliff of books in the study. "I know there isn't. I've head Every, Single, Book in this room a minimum of ten times, and there is no spell for that." Rainbow looked at the books seaming unimpressed by this. " Can you double check?" Dash asked.

"No." was all the answer Twilight gave before opening her book again.

~~~

"Pleeeeeeeeeease?" Dash asked.

Twilight groaned as she knew she would have to put up with another round of Dash saying 'Please' again and again. She buried her muzzle in the book hoping the book would swallow her whole into a world of bloodshed and war just to drown out Dash's annoying voice. And she was having such a good day till now.

Then an idea struck the rainbow pony. "If you help me. I'll leave you alone."

This intrigued the alicorn. If she could find a spell, then she could finally get some piece and quiet again. But she would need to go through all her spell books for a single spell out of countless... It was worth it to get some time away from Dash.

"You promise to leave once the spell to fix your book is cast?" Twilight clarified.

Dash held up her right hand and put the other over her heart. "I promise on the Wonder Bolts code of Conduct article ACC-B. 'on my honor as a Wonder Bolt' That after the spell is cast, you will not see me for the rest of today." Twilight was honestly impressed Dashie could remember all that. But it let her know she was serious.

She stood up from her comfy chair and stretched her arms above her head hearing her back and wings pop. Finally she put her hands on her hips and flew up to the center of her study levitating books from relevant sections to read through.

She couldn't find a book mending spell in: Artificer Bell's 23 Essential Spells for a Unicorn nor 101 Useful Spells, not even in 500,000,000 Spells for Librarians. She was beginning to get desperate and started expanding her search as Dash watched on in wonder, Twilight speedread 5 different books a minute. Nothing. Nope. Nadda. Sorry. Error 404.

There was no book fixing spell in her Library.

Finally she found something in Star Swirls Top 30 Most Dangerous Curses: BINDING. Seamed simple enough. Unicorn takes two objects. Clasps hands with another in a magic circle. Casts the spell. And two become one. The spell even auto searches or the match to the object if you add in a phrase.

~~~

Twilight took the book and flew over to the map room Rainbow following behind. She placed drew several magical ruins from chalk on the map table, then placed Dash's Daring D book 12 in the center. Then she drew out a magic circle from chalk on the floor around her and Dash then clasped hands with her in the center. With that done Twilight closed her eyes and began chanting the spell:

Spirits of Now

Spirits of Before

We ask you to return, we have need of you Now

First Bring Forth what was Lost

The circle began glowing along with the Daring Do book and Dash's Daring Do cover appeared from a portal.

With that done Twilight continued on with the spell.

Second We bring you these two

Who yearn to be one.

Then, without warning the spell dropped the book and began to rap around Rainbow Dash and Twilight making them glow. Dash noticed, but Twilight was to busy with the spell. "Hey Twi..." Dash said quietly not liking how she was glowing.

So please lend us your Power.

To Bind what is meant to be.

As soon as she said that, Twilight opened here eyes and regretted it, as she noticed both her and Dash were glowing now.

In a flash both Dash and Twilight felt an incredible force drawing them in. It was like they were magnetized to one another. No matter how they resisted there was no stopping the spell. They got closer and closer. There bodies glowing brighter and brighter. There nerves got hotter and hotter eventually going numb. There limbs fused into each others, there bodies organs becoming the same. There bodies kept getting closer till they were practically one. They pulled against one another trying to separate, but the most the two could do was keep there heads fusing.

Finally the spell stopped and the new composite mare passed out.

~~~
The freezing crystal castle floor was a rude wake up on her naked skin.

Groggily Twilight opened here eyes first.

She must have fallen asleep on the floor again. It would not have been the first time. She rubbed her eyes whipping the tiredness away. She had the oddest dream of Rainbow Dash needing her book fixed, so she cast a spell that accidently fused the two mares into one body with two heads. She needed to stop reading so late. She tried to get up but found it difficult since her right side was still asleep. Literally. She heard it snoring.

RAINBOWDASH WAS HER RIGHT SIDE AND SHE WAS STILL ASLEEP!

Twilight began to panic. It wasn't a dream. She was now fused to Dash right down the center of her body. How could this happen? How would Celestia react. Or her friends, well Pinkie would want to try it out no doubt, and may even try to convince Twilight to fuse all of them together into one mare, Rarity would use the opportunity to make a whole new line of dresses for her and Dash to wear. DASH! How could she forget. How would She react? She was a Wonder Bolt now, and with Twilight co piloting her body there's no way she could pull of a sonic rain boom. There aero dynamics would be way off due to twilight's horn and second head. Plus then there was each of them only having one wing. Would she be able to fly like this? She needed to test that out. Maybe when she wakes up they can do a test flight. NO. This was no time to experiment on the mental state of a composite flier mare. She needed a counter spell and fast. Who knows what will happen if they wait too long? It might even become permanent after a certain amount of time.

Suddenly the snoring stopped and Twilight heard a yawn.

Dash opened her eyes and saw Twilight right in her face. "Whoa why are you so close?" Dash asked trying to back away on the floor. Only to notice she couldn't. She looked down and noticed that Twilight had completely taken over the left side of her body. Twilight just smiled awkwardly. "Ummmm. Sleep well?" Twilight asked lamely.

Rainbow tried to pull away from Twilight with all her might, pulling kicking and flapping her one remaining wing. This was getting the blue mare no were though, except pain for both of them.

"ow! ow! ow!" they both said as they tried to separate. They shared a skeleton and organs, there was no escape. "This was getting us no were!" Twilight shouted. "ow." Rainbow commented covering her ears.

"sorry" Twilight whispered. "We need to stop fighting and work together. Ok?" Dash nodded. Counting to three they finally managed to get to there hooves. Or hoof, technically since they now each only had one.

Now standing they could finally get a better look at themselves, and what they saw was very interesting. The spell had not simply cut there bodies down the center and fused them. It had altered both there bodies to match on both sides. Aside from the color of there coat, and the split miss match of there two tail styles, it looked they had always been one mare. Previously, being an alicorn. Twilight was slightly taller than Rainbow. Now there body was the same height as Twilights, what was even more interesting was they even seamed taller than before some how. Along with that Twilight had D cups, were as Rainbow had A's. Now there chest consisted of two modest C's. This surprising Dash who had never had breasts that size for her self. But it wasn't just Twilights features on there shared body. Rainbow's athletic form had spread to both sides, giving Twilight a six pack for the first time, and an impressive set of arm, leg, and wing muscles. Along with that Twilight may have had the second biggest breasts in the group (first going to Fluttershy at H, followed by Pinkie and Twi both at D) she was always last in the ass department. Now with Rainbow's butt (which was only surpassed by AJ's) they had a good hourglass form with decent muscles. As weird as it sounded in her head. Twilight and Dash did look good together as one mare. And Twilight could tell Dash thought the same given how she was drooling, itching to grope her one breast. Maybe this wasn't as bad as they both thought at first. "To be fair, the spell said 'To bind what is meant to be.'" Twilight said with a smile.

Rainbow snapped out of her hypnotic trance and glared at the purple alicorn with a hand on her hip.

"What?" Twilight shrugged still smiling.