Twilight Sparkle continued blasting Fluttershy with magic. She changed the spell each time apparently because each ray did something different to Fluttershy. Fluttershy's legs quivered as she was forced to endure the magical barrage. Twilight tried every trick in the book, quite literally. She would flip a page, quickly read, charge a new spell and then launch it at the giant yellow pegasus. One spell made her mane grow down to the ground, another blast gave her a pink moustache and another made her feel like she had scales for a moment... like she was a dragon or something. These random sensations didn't last more than a moment though and soon Twilight collapsed in a heap, exhausted by the expenditure of energy. Fluttershy was actually slightly relieved that her friend was too tired to continue for the moment. She exhaled the breath she'd been holding in hoping that none of them noticed.
"I... don't... get it.", Twilight said, panting. Pinkie pie and Spike had retreated inside the house. They watched from the doorway quietly; it was best not to disturb Twilight when she was... driven to do something. "Why is nothing working?!", Twilight asked through gritted teeth.
"Um, Twilight maybe we could-", Fluttershy tried to begin only to be interrupted by Twilight rambling in frustration.
"I tried everything! Every trick in the book and still it nothing works!"
"Twilight, I was thinking..."
"Every other spell works but this one and it won't reverse!"
"Twilight, I think that if we-", Fluttershy was cutoff again. Despite her size, her timid nature continued to lead her to be ignored by Twilight who was deep in some sort of frantic, private discussion with herself, her knowledge of magic and the universe around them.
"Maybe we should ask the princess!", Spike suggested. Fluttershy nodded; this was exactly what she was going to recommend.
"Princess Celestia?! No, no! She can never know this! If she found out I couldn't perform a simple sizing spell she'll take me back to Canterlot, make me take remedial magic classes, she'll-", Twilight panicked. Her friends understood that Twilight was just like this from time to time, especially when the princess was involved. It was best to seek alternatives.
"Well, who else knows a lot about magic?", Spike asked in as innocent a voice as he could manage.
"What's something else that's small that grows really big?", Pinkie thought aloud, her mind already outside the box and in the right direction.
"Seeds?", Flutterhsy suggests.
"Somepony who knows a lot about seeds, plants, trees!", Pinkie followed her idea.
"I think I know where you're going Pinkie. We should ask Appl-"
"Rarity! That's a great idea Twilight! I'll go get her!", Pinkie Pie said, interrupting Twilight and galloping off in the direction of Rarity's house.
"Wait! Pinkie, what is Rarity going to- and she's gone.", Twilight said in a defeated tone.
"Maybe we should go see Applejack and-", Spike tried to ask.
"Stand back citizens of Ponyville! The GREAT and POWERFUL Trixie shall vanquish the beast!", announced Trixie as she walked over to Twilight's house, horn glowing. Trixie launched a spell at Fluttershy aimed right for her head. Fluttershy crouched down, closed her eyes and covered her head with her hooves. She just narrowly avoided the blast as the ray soared over her and into the distance. Trixie gritted her teeth, undaunted, her horn glowed again as she prepared to cast another spell.
"Trixie no!", Twilight yelled. Trixie aimed at the cowering Fluttershy and unleashed another magical blast. The spell would've been unavoidable but Twilight blocked it with a spell of her own. Both spells collided in the air creating an explosion that scorched the ground with bright purple fire and pale blue smoke.
"What are you doing Twilight Sparkle? This beast destroyed the market place! You should be helping Trixie destroy this menace!", Trixie said as she charged another spell.
"Trixie it's not a monster! It's really Fluttershy!", Twilight shouted, trying to stop Trixie.
"Trixie saw this creature destroy half of town on the way here! Clearly Twilight Sparkle is confused!", Trixie said as she fired another ray of magic. Fluttershy continued to cower behind Twilight. She shivered and covered her eyes with her hooves, her quivering body making the ground shake slightly.
"Stop it Trixie!", Twilight said as she intercepted another beam with one of her own spells. Sweat poured down Twilight's face. She'd been exhausted trying to use her own magic to fix Fluttershy, she didn't have much energy left to keep countering Trixie's spells. She had to get Trixie to see reason, not an easy task despite the fact they'd become friends recently.
"What is Twilight Sparkle doing?", Trixie demanded.
"Trixie, this is Fluttershy! She's just... somehow become giant.", Twilight explained.
Trixie's horn stopped glowing. "Giant? How exactly did Twilight's friend become a giant monster?"
"I... was experimenting with a new spell..." Twilight began, humiliation crossing her face.
"The Seismic Size Spell. The spell was supposed to change the size of things, make things bigger. So, we tried it on a glass of water. But..." Spike continued.
"I may have missed and hit Fluttershy." Twilight finally admitted.
"Mffff-ahahahahahahaha! Twilight Sparkle MISSED? Not even a moving target? Trixie can hardly... Trixie can...ffffffahahahaha!!", Trixie laughed out loud. Spike put his palm to his face. Twilight glared at Trixie and blushed slightly. How could she have missed? Really, how COULD she have missed? Point-blank range, she could've sworn she'd hit the glass and yet... here they were with a giant Fluttershy. The spell seemed to work, now it was just a matter of learning how to reverse it. Twilight made a mental note to make sure the curtains were drawn next time she experimented with a new spell. If there'd be a next time.
"I'm sorry... Trixie just cannot believe... something like this could happen.", Trixie said, stifling another laugh. Twilight and Trixie had only recently got on good terms with each other, Trixie's attitude still took some getting used to. Trixie was a very proud unicorn and like Twilight had a talent for magic. Her pride made her arrogant though, something that Twilight had dealt with on at least two seperate occassions already. It was hard for her not to see herself as better than every other pony but slowly she was beginning to understand the concept of equality. It couldn't happen soon enough for Twilight.
"So the great beast is really Twilight's friend Fluttershy?", Trixie asked, another laugh rising in her voice and ruining her composure.
"Yes. The Seismic Size Spell must've flown out the window and hit Fluttershy.", Twilight said. Fluttershy nodded behind her.
"Hmm. Let Trixie see the details of this spell.", Trixie said as she walked over to Twilight. Twilight levitated the book in front of both of them and turned to the page of the spell in question. All spells have a way of reversing their effects, usually by reversing the spell itself. But for some reason, reversing this spell had yeilded no results.
"I've tried the reversing the spell, minimilization spells, everything. Fluttershy's still giant for some reason.", Twilight said.
"Well, it seems that the Seismic Size Spell is a bit stronger magic than Twilight Sparkle is used to.", Trixie concluded as she looked over the spell. Twilight frowned. Magic was her field of expertise and her knowledge of the subject was extensive. She worked hard at what she did and practiced often. Under the tutelage of Princess Celestia, she aspired to master magic as a unicorn sorceress. Trixie and Twilight had fought using magic before and being criticiszed by her former rival hurt Twilight's confidence. But there seemed to be no other explanation. This incident only demonstrated to Twilight that she still had much to learn.
Trixie glanced over to see Twilight frowning with her eyes to the ground. "Um, perhaps if we combined our magic? Both of us cast the spell in reverse at the same time?", Trixie suggested, noticing the discouraged Twilight.
"It's worth a try.", Twilight said looking up. She was relieved that finally she was trying to do something helpful.
Both unicorns stood apart from each other and faced Fluttershy. Spike closed the door of Twilight's cottage and watched from the window with one of Pinkie's spontaneously conjured combat helmets. Fluttershy's legs started shaking again as she was about to be subjected to more magical experimentation. Both of the unicorns' horns began to glow as they prepared to cast the spell in reverse.
"Oh dear heavens is that really Fluttershy?", a voice asked from behind both of them. Both Twilight and Trixie turned to face whoever had spoke, a moment too soon. Their spells launched into the air and collided with each other but instead of creating another explosion, they combined into one beam and flew off into the distance.
"You're not supposed to cross the streams!", Pinkie Pie said as she and Rarity approached the scene.