[A pause. How exactly to explain...hm... Well, the easiest way is probably to show his nerd card.]

It's more like they do the magic. Think of a creature in a game, when it does magic. A little like that.

[It may be a rudimentary explanation, but it'll do for now. There's a lot more to it than that, of course -- elements of self, acceptance, identity...but that gets a lot more complicated, and besides, the general idea really is pocket monsters but they're in your soul.

Anyway, he's more interested in what Tsuna's talking about. Especially in relation to Tsuna is; Yu hadn't pictured him as much of a fighter, in all honesty. So this is a surprise.]

I haven't. "Dying will"...what does it do?