"Greetings travellers! You must have had a harsh journey through the desert."
"We didn't see this city was on the map."
"We're just a few like-minded folks trying to keep the world out."
"How many people live here?"
"Just a few of us, and now you."
Just imagine a powder, that could make thing eatable (like swords or rocks).Try it an it will be verry funny.Just imagine..characters will need to get some information from someone. And if he will saw, as one PC is eating his sword.