Starlight & Trixie teleport to Trixie's wagon, and Trixie feels unqualified to deal with a changeling invasion.

Trixie: panting I can't deal with this! I'm just a performer! This is... This is princess-level stuff! But the changelings have all the princesses. We're doomed!

Starlight Glimmer: Maybe not. Uh, Queen Chrysalis only said they took Luna and Celestia and obviously Twilight and the others, but maybe Cadance is still safe. Our best bet is to get to the Crystal Empire before the changelings do. That way we can—

Thorax: There's no help coming from the Crystal Empire.

Trixie: shrieks

Starlight Glimmer: She uses her horn to trap Trixie in a sound-proof bubble Thorax?

Thorax: Yes.

Starlight Glimmer: Your wings look... different.

Thorax: I guess they do.

Starlight Glimmer: How do I know you aren't some other changeling pretending to be Thorax?

Thorax: You were there when Spike defended me to the ponies of the Crystal Empire. Princess Twilight said- Thorax transforms into Twilight As the Princess of Friendship, I should set an example for all of Equestria. But today it was Spike who taught me—

Starlight Glimmer: Okay, okay. I believe you. We don't need the whole speech. Thorax transforms back Trixie, this is Thorax. He's a reformed changeling. He's on our side. Understand? Starlight pops the bubble

Thorax: Hi. It's a pleasure to...

Trixie: shakes in fear and is up against the wagon wheel If Starlight says you're on our side, I believe her. But maybe just stay over there for now, okay?

Starlight Glimmer: What did you mean there's no help? Did the changelings get Cadance too?

Thorax: They took Cadance, Shining Armor, and Flurry Heart! Sunburst sent me here to get Princess Twilight's help, but... but it sounds like it's too late for that, too! So... what should we do?

Trixie: Yeah, Starlight. What are we gonna do?

Starlight Glimmer: I... I don't know! There has to be somepony else who can handle this!

Trixie: There is nopony else! Everypony with powerful magic is already gone!