The five ponies and Princess Celestia went outside. They saw many small storm clouds coming at them, followed by a much larger one that had Evil Rainbow Dash sitting on it. But it wasn't just her on the cloud. They saw a small, orange figure with a purple mane. Scootaloo!
"I'm coming for you, Celestia and... Wait, Twilight?" Rainbow said. "I thought I got rid of you already!"
"Well, you didn't," Twilight said
"Okay then," Rainbow said. "I get to kill you twice and it'll be just as fun!"
"What is going on?!" Princess Celestia said.
"She's turned evil," Twilight said. "I told you earlier. Remember?"
Rainbow made lightning strike from on of the clouds on command, and the lightning hit Princess Celestia on her foreleg near her shoulder.
"Princess!" the five said at the same time as the princess fell to the ground.
"Girls," Princess Celestia said weakly. "Try... to get... her... to... remember you..."
"What?" Twilight said.
"Trust me... it might... work."
Rainbow's lightning stroke again on Twilight's back hoof, causing her to go down as well.
"Rainbow," Twilight managed to say. "Why are you doing this to your friends?"
"Friends?" Rainbow said. "I don't need friends. Just power! Now hold still so I can finish you off for good." Just before she shot lightning from one of the small clouds, Fluttershy managed to fly into the bottom of the cloud, causing the cloud to poof. Rainbow and Scootaloo fell to the ground. They stopped falling when they put their wings out to start flying.
"Rainbow," Twilight repeated. "Why are you doing this?"
"I must kill anypony who sees me," Rainbow said. "Then, I will rule the world!"
"How will you rule the world if everypony might see you? I mean, they might have to. Won't they?"
Rainbow stopped for a second. After a few seconds, she said, "Okay, you girls are starting to confuse me!" She walked left and right a few times. "Scootaloo! Get me some water! I need something for my brain."
Scootaloo left and a few minutes later she came back with a glass of water. She gave it to Rainbow.
Rainbow took a sip of her water, but spit it back out. "It's warm! You expect me to drink warm water? Where'd you get this from, the lake?" She splashed the water in Scootaloo's face. "Go refill this with cold water!"
Scootaloo was just about to leave again until Twilight stopped her. "Scootaloo! Don't! You're not her slave!" Scootaloo stopped in her tracks. Twilight continued. "Come over here. No matter what she says, come over here. She's evil."
"What, you won't be on your sister's side?" Rainbow said.
"I'm sorry, sister," Scootaloo said.
"Okay, fine," Rainbow said. "I guess I'll have to kill you along with the others." She warmed up the lightning clouds so the lightning would be more powerful. Powerful enough to kill the other seven ponies.
Twilight came up with an idea, but she only has one chance at it. "Hey! There's somepony trying to tackle you to the ground!" She pointed a hoof behind Rainbow.
Rainbow looked behind her and said, "I don't see anypony. Who's trying to tackle me?"
"I am!" Twilight jumped on top of Rainbow and knocked her off her hooves. Twilight looked at Rarity and said to her, "Can you make a rope with your magic?"
"Why can't you?" Rarity said.
"I'm busy here!"
"Okay." Rarity used her magic to make a fifteen-foot-long rope. She levitated it to Twilight, who grabbed it and tied it around Rainbow so she can't move.
"I'm gonna go to my library!" Twilight said. "Make sure she doesn't try to escape!" She flew away towards the library.
"Wait! You can't just leave us here!" Twilight heard Rarity yell out from the ground. "Twilight!!"