It was already wedding day, Celestia had already begun the ceremony. The entrance doors opened revealing Cadence, who had a mischievous smile, but no one seemed to notice or care about that. Rarity looked like she was going to cry, but then she took a handkerchief and wiped her tears away. While Applejack took her hat and put it on while looking sideways. As Cadence climbed the stairs, she and Shining Armor looked at each other. But what no one noticed, except Cadence, was that Shining Armor’s eyes were green. Celestia began to speak, “We are here at this ceremony to bring these two ponies together. If any pony goes against these ponies getting together, talk now or shut up forever.”

“I’m against!”

Everypony looked and saw a black unicorn with ethereal mane. The unicorn didn’t seem happy about it. Everypony was surprised and scared. But who were most scared were the friends of Twilight, Cadence, Spike and Celestia, because they recognized who this unicorn was.

“Twilight?” asked Celestia. “Is that you?”

“Twilight? I’m… Nightmare Sparkle!” said Nightmare Sparkle.

Everypony in the room was surprised and frightened by this revelation.

Nightmare Sparkle slowly approached Cadence as she smiled. Cadence looked scared.

“B-back off, Twilight!” cried Cadence, before casting her magic. But Twilight made a shield to protect herself as she continued walking.

When Cadence stopped casting the magic, Twilight took off her shield to speak. “It’s no use, Cadence. You will not stop me. That is, if I should call you by that name.”

Cadence was nervous. To her surprise, the mares blocked the passage of Nightmare Sparkle. “If you want the princess, you have to go through the five of us.”

Nightmare Sparkle shook her head as she smiled. “You guys are such idiots,” she charged her magic before casting on the five mares. But to her misfortune, they jumped away.

“Twilight, what the hell happened to you?” asked Applejack.

Nightmare Sparkle laughed before answering and putting a hoof on her cheek. “Oh? Looks like you have a poor memory. ”

“What are you talking about, Twilight?” asked Rainbow Dash.

“Don’t you remember?” asked Nightmare Sparkle. “You ignored Twilight when she said Cadence was evil”

“Twilight, but you were accusing without proof!” shouted Rainbow Dash.

“Ah-ah. I’m not done talking yet,” said Nightmare Sparkle. Rainbow Dash got angrier.

“And you know what happened after she was left alone, ponies?” asked Nightmare Sparkle.

No one answered.

“She cried, you fools!” shouted Nightmare Sparkle. She walked back, only now angrily and went to Celestia, who was saddened by what Nightmare Sparkle said.

Nightmare Sparkle went to Celestia and put a hoof on the chin of the princess. “And Celestia, you ignored Twilight when she needed it most! Do you know what happened next?”

Celestia was crying with guilt. She didn’t want to answer Nightmare Sparkle’s question.

“I showed up and comforted her,” replied Nightmare Sparkle.

“This ... That’s very nice of you,” said Fluttershy with a smile.

Nightmare Sparkle took her hoof off of Celestia’s chin, looked at Fluttershy, and lowered herself to Fluttershy’s level. “Do you think I did just that? I comforted and offered an offer.”

Celestia was worried. This thing couldn’t be what she thought it was.

“I gave the offer to take control of her body and she accepted,” said Nightmare Sparkle, before getting up and laughing. “And now, you will never see the lavender unicorn again. The same unicorn that defeated me when I was in Luna’s body.”

“Nightmare,” Celestia acknowledged who was in Twilight’s body.

Nightmare Sparkle smiled. “I see you still remember me, Celestia. Ready to not see the sun anymore and have only the moon and the stars in the sky?”

“Please, Nightmare!” cried Celestia through tears. “Let Twilight go. I want to apologize to her”

“Apologize?” asked Nightmare Sparkle. “Did you forget what you told her?”

Celestia remembered what she said and made her cry. She didn’t know why she spoke that way to her student. Why didn’t she say it more calmly? Now, she lost her student to Nightmare. She had already lost Luna. Now, she lost Twilight Sparkle to Nightmare.

“Twilight, can you hear us?” asked Applejack. “Fight it!”

Nightmare Sparkle looked at Applejack. “Twilight can’t hear you. She’s currently watching everything from her mind while I control her body.”

Rainbow Dash flew to Nightmare Sparkle. “You monster! Let Twilight go!”

“Never!” shouted Nightmare Sparkle before casting damage magic on Rainbow, but the pegasus swerved flying to the left. Nightmare Sparkle seemed a little annoyed that she couldn’t hit Rainbow Dash. But she became calm again and looked at Cadence with a smile.

“I see you are very quiet, Cadence,” said Nightmare Sparkle. “Anything to say about losing your favorite foal?”

Cadence was nervous. She didn’t know what to say.

“Are you really Cadence?” asked Nightmare Sparkle. “Or is it a changeling?”

Cadence looked nervous at the last sentence. “I’m not a Changeling, Twilight. Where did this idea come from?”

“Do you know who you’re talking to, Cadence?” asked Nightmare Sparkle. “You’re not talking to Twilight. You’re talking to the queen of nightmares.”

Nightmare Sparkle has carried its magic. Cadence stepped back as Nightmare Sparkle walked over to her.

“Please, Twilight!” cried Cadence. “Don’t do it!”

But to no avail, Nightmare Sparkle used her magic on Cadence. Everypony was surprised. But Nightmare Sparkle didn’t kill Cadence, just took off her cover. When she was done, Nightmare Sparkle went to the creature.

Chrysalis opened her eyes. She was no longer scared and started to laugh. “You're right. I’m a Changeling, and As queen of the Changelings, it is my duty to find love for my subjects. And Equestria has more love than anywhere I’ve ever encountered! And each time I feed on Shining Armor’s love, he becomes weak, as does his spell to protect Canterlot. Me and my subjects will dominate all Equestria!”

Nightmare Sparkle stopped walking. “Queen Chrysalis, you will not dominate Canterlot and all Equestria. That will be my role that I will do.”

Nightmare Sparkle charged her magic before casting on Queen Chrysalis, but the queen also cast magic. The two spells were struggling to gain control. Although Chrysalis has the power of Shining Armor’s love, that wasn’t enough for her to win. Nightmare Sparkle managed to win with the force of hatred. Chrysalis was on the floor, stunned. Nightmare Sparkle caught Chrysalis with her magic. “Now answer me one question: Where is the real Cadence?”

Chrysalis opened her eyes. “In… In the crystal cave….”

Nightmare Sparkle threw Chrysalis to the ground before using her magic and casting it to the moon.

The Changelings who struck the shield saw Chrysalis being thrown to the moon, they stopped what they were doing to follow their queen.

Nightmare Sparkle looked back at the audience ponies. “I hope you all are ready to see the stars and the moon in the sky. Because the night will be eternal, and this time it will be forever!”

Twilight's friends were surprised by the words of Nightmare Sparkle. They were very sorry they didn’t hear Twilight. Thanks to their negligences, they lose Twilight. Celestia didn’t know what to do to get her beloved student back. Without Twilight, the Elements of Harmony wouldn’t work. And now? But until she remembered what Chrysalis said: Chrysalis said the real Cadence was in the crystal mines.

Nightmare Sparkle stopped laughing. “Well, I’m going. I have a castle to decorate in Everfree Forest and when I return, I will have a conversation with Luna.”

Nightmare Sparkle realized that she had no wings and wasn’t an alicorn. She decided to walk. As Nightmare Sparkle left the room, she closed the door.

Twilight’s friends were very sad. But the saddest things were Spike. Spike was crying, he lost the pony in which he saw as a mother.

Applejack looked at Celestia. “And now, princess? What do we do?”

“Let’s save Cadence,” replied Celestia. “Chrysalis has said Cadence was in the Crystal Cave.”

“But what if she’s lying, princess?” asked Applejack.

“Applejack, I’m sure she’s not lying,” said Celestia. “Now who will come with me?”

Who answered in unison were Spike and friends of Twilight. “Me! Me!”