Divine Class (Divine-Class is made up of the various gods and figures of mythologies and legends. Unlike the Regulation-Class, Divine- Class beings were not created by humans and have always existed in worlds beyond the real world. These include gods like

While hiding behind a giant warehouse, the sisters began to sweat when they realized what had caused the shaking.
They could see the gantry cranes used to lower containers from cargo ships, but several objects twice their size were slowly moving through the harbor.

Yellow and green light indicated the location of the monsters’ eyes in the darkness and the great height of those eyes was enough to fill the girls with fear.
And they were not optimistic enough to think these had been summoned by their allies.

“Renge, those are…Fafnir and um, uh, Yamata no Orochi…aren’t they?”

“Dammit. They’re summoning Divine-class Materials!?”

Monsters of such high purity and power did not simply appear on their own.

Long ago, people had believed the gods could appear anywhere and at any time, but once it was all calculated out, the places and conditions for them to descend were so few it had left the religious leaders speechless.

There was only one possibility here.
This was the work of summoners.