The time has finally come, when the current of Spiritual Qi passing through the World Stone, started spilling so much of it, that it was enough to power the Grand Formation to its full potential.
The Symbol Arts Masters, who would be stationed within the fortress, and periodically rotated out, activated the Killing Array, demonstrating they were capable of slaying 4th and 5th tier Demonic Beasts, granted they were neutralized with the stink pills first to keep them from dodging the relatively slow build up of the attack.
The time spent here in wait of this moment, also demonstrated the fortress could sustain this defense without fatal casualties, and the healers were more than capable of relatively quickly return fighters to the frontline.
