It glows, then makes some wind!

...quite a lot of wind, in fact! Much more than he'd been expecting, probably, given the way all cards that are not itself and the Song start being scattered. Magically scattered, that is, they fly in all directions and go straight through the walls and ceiling as if they were completely insubstantial.

"Eugh!"

Stiles falls backwards, knocking over the table lamp. 

He looks at the girl.

"Song? Are you okay?"

"Yes," she sings, although the word is too short for the song to be recognized.

The cards all have scattered by now, and the Windy is no longer glowing.

"Scott, is everything okay up there?"

"I'm fine! I'll get the lamp cleaned up tomorrow."

And indeed, the glass remains of the lamp have been somewhat blown about. 

"So we're down fifty magic cards. Any ideas?"

"No. I'm going to put this one back in the book and see if I can get Song to talk to me more."

He opens the book again, to place The Windy card back inside. 

The Windy will endure this indignity.

"Song, can you be a card again, if that's okay?"

She nods, and becomes a card again, floating toward his hand.

He takes it, smiling. 

"Okay, that is kind of cool."

He goes to put this one in the book, too.

It too will submit to this indignity.

Scott closes the book, and slides it under his bed.

"Stiles, I think I'm going to have to sleep on this. If it seems like it actually happened tomorrow, we can figure out what we have to do."

"...Have to do?"

"If someone picks up The Firey I don't think that will end well. Some of those cards could be dangerous."

The book starts glowing.

"So you want to, what, look around town for the cards? We can't find them all, Scott, and we aren't the ones who left a magic deck of cards in the middle of the woods!"

"If they activate they won't be hard to find."

"Damnit, Scott! I am not going to wander aimlessly until we find them. Let them start forest fires, for all I care. I've never met Smokey the Bear and I don't think-"

His eyes fall on the book. 

"Great. More magic we can't control."

Scott turns around, stepping away from his bed. He stands in front of Stiles, as though to shield him from the glowing book.

And from the glowing book, slowly, insubstantially, emerges...

...a plush winged bear.

"Can I summon bears by talking about them? That's a really specific magical power."

"Hello? Book person? I'm Scott."

The bear opens his eyes and—

—says "Hellooooo! My, that was such a good nap!" Its voice is high and childish, and it looks cheerful and happy.