North Continent.
Gu Castle Fortress.
In the Great Cold, snow drifted, and from afar, a steel-casted bulwark stretched thousands of kilometers, rising from the ground like a giant guarding the majestic North Continent border. Above the massive fortress, a sky-covering barrier was held up, with hexagonal lens-shaped transparent floating plates densely interlocked, forming a giant hat on top of the giant's head.
Describing it as a "hat" might not be entirely accurate… it seemed more like a "large umbrella."
Under the large umbrella, hundreds of flying vessels were suspended due to a peculiar "energy effect," quietly hanging ninety kilometers above Gu Castle Fortress. The turbines seemed to be dormant, not operating, yet the streamlined vessels, sword-like, miraculously maintained stasis without emitting any jets of gas or heat waves. They were like old-fashioned shuttles placed on a loom, merely waiting for their master to give the order.
