The massive iron ships before their eyes, although not material in the normal sense, represented that the monsters controlling these battleships possessed sufficient intelligence and technology, and had even developed a civilization.
This was enough to strike fear into anyone's heart. In the human world, while there were monster invasions and evil spirits causing considerable destruction,
in the overall battle situation, humans still held the upper hand. Even if a powerful evil spirit capable of wreaking havoc in a city appeared, it would soon be suppressed, expelled, or even slain by humans!
And what was the reason for this advantage? Niyaji, as a grand exorcist, couldn't have been clearer; it was because humans had built a civilization through their intelligence, and with the advantage of civilization, suppressed all non-human entities that invaded.