He's all set to snipe back in, probably, a deeply stupid fashion when suddenly -

"Really?" The aggravation is blunted, a bit, as he regains his bearings; it's been a while since teleportation was a normal part of his day, and he was never that thrilled with it to start with. "Well, if we're just throwing magic around - "

Casting Daylight in a dim library is definitely overkill. He's doing it anyway.