Both sin and virtue resisted each other. Noah's power and the Seraphim's power seemed to be equal, but the moment the Seraphim's wings unfurled, the holy creature showed why it was considered a creature of divine status.
The domain Noah built was bathed in a holy fire. Blue divine flames burned away at his slime, forcing Noah to recede.
Watching this, the Angel should've been happy, yet her expression was the complete opposite. Her face was aghast, her eyes wide. Fear that was more extreme than she has ever shown before was reflected in her eyes. She wasn't afraid of Noah, nor was she afraid of what the envoys became. What she was scared of was what the seraphim signified.
There was a reason that God forbade the strongest of his angels to never visit the mortal realm, there was a reason why the strongest creatures of hell respected that same boundary.