*What Sirius wants to say is, That's lovely for you, we'll just win the war without your help. But he doesn't.*

Then what are our other options, Lily? Trust Reg to come over to us with blackmail and risk tipping our hand to him? Polyjuice, which might nullify any advantage these papers give us by taking too long? Why do we have to be better than them? We just have to beat them. It's not like one Unforgivable and suddenly I'll want to set you on fire.