Ed felt positive he could figure out Elsa's trick behind the frosting throne, at least until it seemed to spread to her dress and transform it. Ed could transform his clothes too, but that required a clap of his hands and a visible energy transfer. As much as it looked like her clothes and the throne were being transmuted, the other signs of transmutation were completely absent.

"You're really trying to convince me about this magic stuff, aren't you?" As much as he hates it, she's doing a damn good job. He has no idea how else to explain what she's doing at the moment, and that makes him hate it more.

"If I could clean the air then I'd just clean it!" Transmuting it wouldn't work too well. Besides, it'd only solve the symptom, not the problem itself. "Whatever's pumping the crap out just needs to be cleaned and filtered."