Crete Island, coastal fortress.
After the sturdy defense lines, which were built from clay, volcanic ash, granite, and rubble and layered with densely packed defensive spells, were in place, a burly young man with bronze armor and a classical Greek face, characterized by brown-black curls, surveyed the sea where a dark line of Sea Beasts was steadily advancing amid a rain of arrows and long-range Magic Power beams, methodically giving out commands.
"At 800 meters, crossbowmen retreat and reload! Casters, move up to suppress!"
With that resonant voice, amplified by a series of resonance spells, spreading throughout the entire army, the male priests and female priestesses arrayed along the narrow defense line began to assemble in an orderly fashion.