There were also other divine beings at the scene. There were the avatars of gods. There were three of them besieging the divine calamity.
These avatars didn't have the inspiring might of the avatar of the 9 crowns in the perception of mages. They also couldn't fly, but they were still dishing out massive spells that created earth-shaking explosions.
Each spell was like a nuke. The explosions were so bright and powerful that they cratered the fur of the divine calamity and caused icy blood fire to pour out of it.
These three were the major damage dealers while the humans swarmed the zephyro with ranged damage. There was no communication between them. The gods did their thing, and the mortals struggled to keep up with them and not get blown up by the spells of the gods.