The Southern Border battlefield covered an enormous area, its battlefront stretching for several billion miles.
There were two lines of defense throughout the Southern Border. The First Layer was undoubtedly the bridgehead against the Abyss Race, consisting of three hundred war fortresses.
Every war fortress was a divine artifact, a grand formation, and a city.
Such war fortresses were a common means of warfare used by the Human Race and the myriad races of the Origin Great World, making them exceptionally suited for large-scale battles.
Su Mo moved through the void, the space ahead seeming to fold over itself as he crossed it at tremendous speed.
His gaze shimmered with endless divine radiance, as though it could pierce through boundless time and space.
His cultivation had risen from the Creation Realm Lower Stage to the mid-stage Creation Realm. The increase in his strength was immense, having surged more than tenfold.
He spotted one war fortress after another. Soon, he noticed several familiar figures from Primordial Divine Mountain atop one of them. That fortress was about to enter battle, and Su Mo immediately rushed over.
This war fortress was called Xuan Yue Battle City. It was roughly one million miles long and eight hundred thousand miles wide, square in shape and black as ink from end to end, no different from an actual city.
Its walls stood about ten thousand zhang high, piercing the clouds. Like a colossal ferocious beast lying prone upon the earth, it exuded a boundless baleful aura.
There were no houses or palaces within the city, only countless formation patterns that formed small battle formations one after another. At the same time, the entire city itself was a massive battle formation.
At that moment, an allied army of roughly three million Abyss Race and Heavenly Locust Race