I've heard this argument before, man. And my answer's the same now as it was then: if this works, it doesn't matter. Other me either won't come back or she'll come back with a bunch of power and she can't fucking bitch if it gets us all out of here.

A sacrifice is a sacrifice. If you give yourself a papercut it's...okay, it's something, but it's not the kind of power I'm looking for. The point is that it has to be something valuable to you. So if you like keeping your blood in your body? Yeah, that'd work. Not as well as killing someone, definitely not as well as killing someone who wanted to be killed in my name, but it should do something for me.