I wasn't either. But it seemed better than immediately accepting-- [He flicks a hand, as if to indicate the general existence of the toxic miasma] --all of that without question.

[As for how, he lifts one shoulder in a gentle shrug.] Opening up the connection and then sending purifying energy its way before it could send anything back, mostly. It was more intuitive than you'd think, though I'd be lying if I said I didn't have some experience with stuff like that.