Dawn tries to make the conversation more productive by asking Willow how she'd go about bringing Buffy back. Willow doesn't know, but under Dawn's questioning she admits that you'd start with the principles of physics. "You can't really create or destroy anything, just transfer," she explains. Anya makes a pffff noise. "Magic works off physics," insists Willow with some force. And here I thought it worked off of a crappy metaphor for either lesbian sex or drug addiction. "Not without a catalyst. If you're talking about transferring energies you need some kinda conduit," retorts Anya. "Like a Cracken's tooth," says Willow, starting to get excited. Hmm. Anya then uses her special ability to annoy Willow as a way to get her to clarify her own thinking on a subject, if only to prove Anya wrong. Clever girl. No wonder Giles likes her. Kennedy reminds everyone that the book said they would need something to exchange. They decide that it should be the original demon, and that it doesn't necessarily need to be alive. Well, that's convenient. "I vote dead. The demon's mine," says Spike, steadying himself against the doorway. Kennedy snides, "I hate to say it, Big Bad, but you look like you can barely stand. We're trained. And the only thing we know for sure about this demon is it kicked your ass." My God. Kennedy has actually put me in the position of being pro-Spike. For that she must die. That, and the fact that she's a charmless little suck-baby. If there's anything I hate more than a brash blowhard, it's a brash blowhard in the body of a teenager. Spike heads out the door with the cryptic explanation that he's after something he needs.