Given Reiger's current Magic capabilities, just how powerful is his strongest offensive Magic when he goes all out with full chanting?
Just look at Cornus's current state and you'll know.
As a god, and one who has amassed Curse power for over ten thousand years, Cornus's strength ranks near the top among all beings Reiger has encountered so far.
Within this British Lostbelt, its power is utterly unmatched; even Morgan couldn't come up with a definitive way to deal with it, and could only use the Throne and the Twelve Holy Lances to suppress and keep watch, hoping that after Cornus awakened, Britain would still have the strength to oppose it.
It's easy to imagine just how difficult it would be to take on a god who can decide the life and death of an entire British Lostbelt.
Unless Koyanskaya, as a plaything-beast, could reach her complete form, the current juvenile her would be easily trampled if she were to face Cornus as it is now.
