He could say no, but whyever would he want to? "I haven't, have I? How terribly rude of me."

But he's apparently gotten Hermes to relax a little, so that's a little victory there itself. "I suppose you don't mean it in a so we can smash the economy back into the Dark Ages with it sense." Because that would just make so much more work for the Greek and he'd pout about it. "Well, there is a sword named Tyrfing that may suit your fancy."