C330 Set up a Seismic Device

The prophets fall behind.

Instantly, all the residents went to the nearest house and began to search for pure iron.

Very quickly.

Many residents excitedly pushed a huge round piece of pure iron and rushed out.

"I found it!"

"I found it too!"

... "The pure iron collected by every family here has been refined. It is round like a tire!"

"Moreover, on both sides of the circle