"I thought so!"

"That is a seriously amazing pen."

"Thanks."

A few days pass. Assorted magic is practiced. Eventually, Emily fins Cass again and asks, "Me and Edie were thinking about exploring again."

"Count me in!"

"Great! Where's Anna?"

"I think she's on the roof?"

"Cool," she says, finds and opens a window, hops out, and flies up to the roof.

Anna is sitting contentedly and watching clouds.

"Hey! The rest of us are exploring, wanna come?"

"Sure!"

"Awesome."

"Where to?"

"This way!" She ducks down and back through the window.

Anna follows.

Then Emily can presumably lead both Anna and Cass to where Edie's waiting.

Yep!

And then they can start exploring.

As advertized, there is a lot of tarps, dust, and expensive objects.

"You never got anywhere on cleaning stuff up with magic, eh, Anna?"

"Unfortunately not."

"Hmm. Emily, water, please?"

Emily conjures a bucket of water.

And Edie, arms moving in an imitation of a waterbender from A:tLA,  telekineses the water in broad sweeps over every dusty surface unlikely to be adversely affected by the moisture.

"Now we see if the dust vanishes when the water does, if I integrate 'em well enough."

"That was adorable," says Anna. "Not sure about the dust vanishing, though, I don't think we've ever gotten something to vanish by mixing it with a conjured thing, always seems to go the other way around."

"Well, at least it can not-vanish at the bottom of a bucket instead of on tarps."

"This is a big improvement, it's true."