First, it was only Black Sun who had come to the rescue. But in his absence, many mages rose from the barracks, trying to counter the flying weapons of destruction.
However, although they were able to counter a few of them that were closer to them, the ones that were shot through the seaside, there were no military personnel defending from that angle, leaving many missiles to go unscathed.
"We have been made a fool of…" The enemies were hidden too close and not just on the border, it would seem that they had covered the waters with their ships carrying those weapons.
As for how they went unnoticeable, Genera Vera didn't know. Nor did he have time to investigate, the most he can do is hope that the defensive circle that protects the city does its job properly and nothing unsightly happens.