The battle is over.
The southern wall of the rocky ridges Fortress, after losing the protection of the barrier, was utterly defenseless against the bombardment of heavy Magic Crystal Shells. It turned out that when faced with a rigid target like a city wall, Magic Crystal Shells demonstrated a higher destructive efficiency than the Calibrator Beam—Sir Maryland once thought that the rocky ridges Fortress would still have dozens of minutes to resist after the barrier fell, but ultimately, it proved he miscalculated the different effects of shells and energy beams: the wall held for only sixteen minutes.
