"Oh, centuries now. I've not had much call for it since Crowley and I came to our Arrangement. But it's a bit like riding a bicycle, you know."

Aziraphale's eyes flickered briefly after Kira's, and he laughed softly. "Well, perhaps. But not like this. I'd break my neck for certain. Half a moment..."

He lowered his sword and backpedaled a few paces, keeping an eye on his opponent as he shrugged out of his human form. Shining white wings blossomed from his back, and Kira was suddenly facing a slimmer, blonder, ageless figure whose resemblance to Ezra Fell lay mostly in his kindly blue eyes (and even those seemed much brighter and more penetrating, without the unnecessary spectacles to mask them.)

He rolled his shoulders and stretched his wings, shaking off the stiffness of long confinement. "There, that's much more the thing. Now. You were saying?"