The Nightmare Forces attack/Behold Nightmare Twilight

This is how The Nightmare Forces attack and Behold Nightmare Twilight goes in Nightmare Twilight.

[Meanwhile, with the Autobots, Luna, and the Mane Five]

Smokescreen: Come on, Ratch. It's not that bad.

Ratchet: How can you be so sure, Smokescreen? The Nightmare Forces have taken one of our partners. We can't let them take anymore.

Pinkie Pie: Don't worry, Ratchet. We'll be okay. I know. We'll play a game. I spy with my little eye, or optic in Smokescreen's words, something... black.

Fluttershy: Oh, is it that thing that looks like a shadow... of a shadow?

Ratchet: Fluttershy...

Spike: I know! I know! How about...

Rainbow Dash: Every single thing that surrounds us.

Arcee: That's gonna have to be my guess too.

Spike: That extra dark patch of something right below that grayish blobby thing?

Pinkie Pie: Ding-ding-ding! You are correct, sir!

Smokescreen: Whoa. He's good.

Fluttershy: I was so close.

Ratchet: Well, better luck next time.

Spike: Not to toot my own horn, but I'm pretty darn good at I Spy.

[Optimus hears something]

Optimus Prime: Speaking of horns tooting, I think they do know we're here.

Bulkhead: How can you tell, Prime?

Applejack: Yeah.

[The Nightmare Forces arrive]

Optimus Prime: Call it... a hunch.

[The Autobots bring out their weapons]

Applejack: Well, hello there, little critters. With your, uh... sparkly eyes. What do you call that, Fluttershy?

Fluttershy: Possible... Inherent... evil?

[Ratchet stands guard. Luna senses something]

Princess Luna: Something is coming!

[A huge Nightmare Mist appears]

Princess Luna: Run! I have no power over this nightmare mist!

Applejack: You heard her!

Bulkhead: Move those feet and hooves!

[The ponies and Autobots flee as the mist catches up. It engulfs Optimus and he finds himself in Canterlot Castle]

Optimus Prime: What?

[He sees Princess Celestia]

Optimus Prime: Princess Celestia?

Princess Celestia: Optimus, have you recognized how dangerous Twilight can be?

Optimus Prime: What?

Princess Celestia: She is dangerous and cannot control her magic.

Optimus Prime: Celestia?

Princess Celestia: Tell Twilight she is dismissed for eternity.

[Spike and Luna look at him]