He's clearly surprised by her bargain, but after a blink and a slow, thoughtful tilt of his head, he breaks into a smile.

"Oh," he says, "very much agreed."

He feeds some of his energies back into the half-there illusion, restoring the color of his skin and eyes to something less unearthly and reminiscent of winter. "And I will recommend to Thor that he mind his manners. Neither of us are good at admitting when we are outmatched, but I am somewhat more accustomed to being humbled than he."