Once the artillery began its saturated bombardment, it was not something that would wrap up in a matter of seconds.
In other words, if those wizards refused to scatter or take cover, their ultimate fate would be singular: to be blasted into fragments filling the sky.
Fortunately, while these wizards had never encountered such a thing before and lacked experience, they were not fools. Moreover, the mobility of wizards is extraordinarily high, so a mere three or four seconds later, the wizards who had previously been clustered together scattered in all directions, dispersing completely.
Chapter 342