"I-Is it ready yet, Twilight...?" Fluttershy asked. She had been called in by Twilight to test a spell that, if she recalled, was supposed to 'increase her friendship with Rainbow.' But, of course, poor Fluttershy didn't know what that meant. So the pale yellow-furred mare with the light pink mane waited for Twilight to explain, or simply do the spell.
"Just a second..." the unicorn replied. "Okay. Got it!" After she said this, Fluttershy, a little pegasus, stood straight and tall. Twilight's horn started glowing magenta, and a orb of light appeared in front of Fluttershy. Though nervous at first, she remained standing straight and tall. The glowing orb of light flew around Fluttershy, sliding down her body until it reached her inner thighs. The little pegasus began feeling immense pain as her organs transformed inside her body. Slowly her marehood disappeared, a ball sack and a penis slowly appeared in it's place, changing the eggs to sperm and whatnot.
When the spell ended, Twilight's horn stopped glowing and she looked up, panting. This particular spell was difficult to perform, as it changed the pony's sex organs. She expected to see Fluttershy passed out on the floor, as the spell caused great pain in the pony it was being cast on. Instead she saw Fluttershy laying on the ground, panting and groaning. Fluttershy looked up to see Twilight looking at her.
"W-What...? Is it bad? Did it work?!" The pegasi's turquoise eyes showed worry and fear.
"No, Fluttershy," the unicorn stepped closer, and took a look at the pegasi's new length. "In fact, it worked perfectly!"
Fluttershy, of course, was grateful to hear this. She heaved a sigh of relief and looked down, seeing her new length.
"W-What is that?" She looked up at Twi, panicked.
"It's okay, 'Shy. It'll be fine." The unicorn's purple eyes were humble and truthful, and the pegasus calmed down.
"O-Okay..."
"Now, I think it just needs some... testing ..." Twilight smiled deviously at the confused look on Fluttershy's face.
"T-Testing...?" As Fluttershy spoke, she heard a knock on the door and an all-too-familiar voice.
"Twilight? It's me, Rainbow Dash!" she shouted through the door. Twilight trotted over and opened the door, revealing a cyan pegasus with a rainbow mane and tail.
"D-Dashie...?" Fluttershy stared in disbelief, trying to cover up her new length.
"Yep! The one and only!" Rainbow flew in, landing in front of Fluttershy. "Twilight, you wanted me to test something?"
"Yes, I did. You see, I tried out a spell on Fluttershy and I thought you two would be perfect to test it together!"
"Well, I'm up to it! How about you, 'Shy?" Rainbow asked as the looked at the pegasus before her.
"Well, um, I... okay." Fluttershy gave a small smile and Dash cracked a grin.
"Fluttershy, you're so cute when you're like that!" Rainbow said as Fluttershy blushed slightly.
"Well, I'll leave you two alone..." Twilight said as she walked out of the room.
