The problem with raising steam is that it obscures your own vision as well as your foe's, making it difficult to sense where Peter is once he stops his radical spin.
"As much as I enjoy this Form, and I really enjoy this Form," he slurs, giggling every few words, "I get the feeling it's time for a change in pace."
A glow starts to spread through the steam. You should have about ten seconds to do something.
Faster than you thought possible, the glow fades, and a figure rushes at you out of the mist. He's bigger than he was a second ago, thicker, taller, but also kind of stooped. You barely have time to register is a foul smell before he swings something that resembles an axe at your head.