"I'd be very worried if I couldn't work on living people, considering what I was loaned for," he says, deadpan. Loaned, not hired, an important distinction.

"A headache? I can certainly take a look. Sometimes all you need is rest, which...is probably something you should be getting, right now, considering the hour."

He reaches out, despite his words, to give Peter a looking-over with his magic. It's a headache caused by something magical, so he should be able to ease it easily enough.

Keyword should.