Meanwhile, Stiles is telling the class all about his favorite video game character and how nice Scott is to play along.

Does anyone here know what 'cosplay' is?

Scott goes to the basement? 

He doesn't actually know how to get to the basement. 

The people are very confused by the sudden very unexplainable gust of wind and annoyed about all the things it pushed onto the floor.

Scott is a very good friend.

Weren't the effects realistic?

Scott was the one behind the wind? Why would he do that. What's he doing. Why isn't he in class. Inquiring minds want to know.

Well, obviously Stiles declines to explain and rambles on about the game.

"Windy, turn into a card please," he whispers. 

He looks for a way to the basement, and finds some access stairs.

And there the card is, skipping around merrily.

And so is, incidentally, Scott's inhaler. Half embedded on the floor.

Out comes his only other card. 

"Song," throw the card, tap it with the staff, "Draw the card to you with song!" 

The song appears and starts singing, which temporarily stops the unknown card, who looks at him in bewilderment.

Can he have two at once? He didn't ask Kero.

"Windy, trap the card while it's distracted," he says, calling it forth with a twirl of his staff.

And Windy does! The card tries to go through the floor but apparently it's too thick, and now it's well and truly trapped.

At least no one got hurt; hopefully he'll be better prepared next time.

...

Is Kero still in his bag? He checks.

Yes, he is. "You need to capture it, or it'll escape! You should say, 'Through, I command you to return to your power confined!'"

Thanks Kero.

"Through, I command you to return to your power confined."

It glows and becomes a card, then floats slowly to his hand.

He breathes a sigh of relief. 

Then he looks for his inhaler. Last he checked it was in the ground?

Yep, pretty thoroughly embedded.

"The Through can let you go through solid surfaces but the more of them there is the harder it is."

And there are Song and Windy, doing absolutely nothing now.

"Are you guys okay?"

They shrug and nod.

"Song, return to your power confined!"

It does.

"You don't need to say that after you've captured a card."

"Did I capture it? How does that work, Song stayed behind when the others got blown away, but I didn't really do anything."

"Well, now that you're the cardcaptor, cards in your possession are yours, but if you write your name on them that becomes more permanent."