The Last Omnitrix Weilder (ATLA X Ben 10)

City of Walls and Secrets

Katara: Look, the inner wall. I can't believe we finally made it to Ba Sing Se in one piece.

Ben: really I thought this was Avatar: The Last Airbender

Aang: What?

Ben: nothing
Sokka: Hey don't jinx it! We could still be attacked by some giant, exploding Fire Nation spoon. Or find out the city's been submerged in an ocean full of killer shrimp.
Toph: You been hitting the cactus juice again?

Ben: he probably is 
Sokka: I'm just sayin', weird stuff happens to us.

(A very strange man with a glossy stare and a large yellow plant in his mouth takes a seat between Toph and Sokka, and pushes Ben towards Toph startling them. Weird music plays as he chews the plant.

Aang looks out the window then closes his eyes sadly.)

Katara: Don't worry Aang, we'll find Appa.
Aang: It's such a big city.
Sokka: He's a giant bison. Where could someone possibly hide him? Oh.

(The car passes through the inner wall and enters the vas, enormous city. Ba Sing Se stretches almost as far as the eye can see, and is riddled with many roads and buildings. Their car finally comes to a stop at the monorail station. All of them disembark and are greeted by another spectacular view of Ba Sing Se.)

Toph: (sighs) Back in the city. Great.
Sokka: What's the problem? It's amazing!
Toph: Just a bunch of walls and rules. You wait; you'll get sick of it in a couple of days.

(Aang looks at the bison whistle resting in his palm. He brings it to his lips and blows it as he looks across the city.)

Aang: I'm comin' for you buddy. He's here. I can feel it.

(Behind the group, the monorail cars depart. On the other side of the track is a woman with long dark hair that billows in the wind. She approaches them with an unnatural smile on her face.)

Ben: AAAAHHHH!!!!!

Joo Dee: Hello, my name is Joo Dee. I have been given the great honor of showing the Avatar around Ba Sing Se. And you must be Sokka, Katara, Ben and Toph. Welcome to our wonderful city. Shall we get started ?
Sokka: Yes. We have information about the Fire Nation army that we need to deliver to the Earth King immediately.
Joo Dee: Great, let's begin our tour. And then I'll show you to your new home here. I think you'll like it.

(Joo Dee turns around and attempts to lead Aang and his friends.)

Sokka: Augh! Maybe you missed what I said. We need to talk to the King about the war, it's important.
Joo Dee: You're in Ba Sing Se now. Everyone is safe here.

Ben: what's wrong with this chick

(Everyone has a confused look on their face in reaction to Joo Dee's odd statement.

Fade to an overhead shot of the area of the city near the wall. An ostrich horse is pulling a carriage containing Joo Dee, Aang and his friends through the streets. Many shops and refugees line the streets. Cut to a shot inside of the carriage.)

Joo Dee: This is the lower ring.
Katara: What's that wall for?
Joo Dee: Oh, Ba Sing Se has many walls. There are the ones outside protecting us, and the one's inside that help maintain order. This is where our newest arrivals live, as well as our craftsman and artisans, people that work with their hands. It's so quaint and lively.

(Cut to a shot of two shady men conversing in an alley. One of them is holding a large sword that glistens in the light. Both glare at the carriage as it passes.)

Joo Dee: You do want to watch your step though.
Katara: Why do they have all these poor people blocked off in one part of the city?
Aang: This is why I never came here before. I always heard it was so different from the way the monks taught us to live.