"Really, how is this possible?"
"I heard it's because Hope Village came up with their own construction material."
"Cement?"
"Yes, exactly, at the moment, only Hope Village has this construction material. Hope Village's city walls and those new buildings all use this new type material. The buildings constructed with it are extremely sturdy, no less than those protected by Magic Arrays."
"Can this construction be sold?"
"No, currently Hope Village only uses it for themselves, but a few territories seem to have reached an agreement with them. They need to provide shells in order to purchase cement from Hope Village."
"Shells? Can shells be used to make cement? Hope Village just told everyone the raw materials like that?"
"Yes! Hope Village has never hidden this fact."
