Above the base of the sentinel towers, floating in mid-air with the help of anti-gravity technology, is the most important "functional facility" of this tower, known as the "Stele" shield projector.
The energy barrier of the great walls is maintained by the "Stele," but its function is not limited to creating a shield. As a powerful magic facility, the Stele has a very complex structure and function. While creating a shield, it also acts as an upper sensor, monitoring the barrier situation at over a thousand meters high in real-time, tracking energy tides within the wasteland, and reporting its status to the Magic Spirit Mind within the base at any time.
The sensor array within the Stele might be the last unit that could malfunction and bypass the Magic Spirit Mind.
