[Huh... Minato nods quietly in response to that; he doesn't have a lot to contribute, because in truth he agrees with everything Tonbokiri is saying. Right now, they have no way of really knowing how to duplicate their results, so... as he picks up each rock carefully, he's going to offer up a simple:]

We need to try... to see what further quest rewards will do for us... [Heavy. Heavy rocks... He has to remember what he's doing this for!]

It might be hidden conditions we don't...know we're completing, too.