The twelve spherical surveillance devices flying in the sky.
Two pairs of transparent wings support their aerial hover, with the gigantic mechanical eye on the ground continuously recording everything below.
This is one of Kane's preparations for the World Ring. Since this world is flat, it doesn't have the concept of spheres nor the cosmos.
So once the aircraft reaches a certain altitude, it will encounter a kind of barrier, which is the world's barrier. Crossing it leads to the void.
Kane tried, but to break through this barrier, a gold-level power is not sufficient at all.
Hence, the previous concept of using space satellites to fly into orbit for navigation is not applicable.
To solve the endurance issue, Kane, with Lulu's help, engraved intricate magic arrays on each surveillance device.
