บท 2389: 2389. Stress Cracks

"What is that sound?" 

That was what people were first thinking when they looked up at the partly cloudy sky. Many of the staff needed for the unloading of the floating ship had already been brought back to be ready. They knew that the floating ship would appear sooner than later. 

What they did not know was why the earth walls had been made. Why there were wind rune dampening formations? These would stop the wind from pushing past the walls and make sure that everyone was safe. 

None of this was what they needed when the floating ship had taken off. Specifically, the floating ship had been made so that the wind it used to help it direct itself and float would not be an issue at all. So why did they need these specific rune formations and walls?