[Well. For example, a flying city is kind of impractical. Figuring out a way to get it off the ground, keeping it from running out of energy, and then...there's the dome.]

I'm sure we'll find a way if there is one. [Or make a way. That works sometimes, too, although it's usually way more reckless.]

Hey, it's all right. Not everyone needs to, and that's probably a good thing. Basically if it's made out of metal, the smithy works on it. You just heat it up so you can shape it into whatever you want, then let it harden back. [Admittedly this is an extremely abbreviated version of the work process - Ginji's learned not to bore people with all the details unless they ask for them.]

So there's things like swords and tools, nails...we even had a request for a kind of engine once.