Disclaimer: I do not own Supernatural. For this story, I own only two major original characters, Moses Levinsky and Sefira, the Lesser Darkness.
Adversarial Force
A storm whirl and a fire whirl are situated with an appreciable number of humans nearby, most of whom were religiously sensitive. These forms had been assumed respectively by the two nigh-omnipotent entities of primordial existence, the Darkness and God, so as not to offend the very particular sensitivities.
There were three special humans within the crowd. The Winchester brothers, Dean and Sam, were two of them. The third was the chosen Prophet of the Eternal, Moses Levinsky.
Together, the two primordial siblings exchanged thoughts telepathically.
It is almost time, isn't it, Brother?
Indeed, Sis: the line must be drawn here! The 'new God' that these Joes and Janes have been rejecting, that beloved of yours, is about to hit a major roadblock when it comes to my prophetic appointee and these Winchesters!
Still, my daughter has made impression after impression upon many millions of your human creations! Supervolcanism and megatsunamis were all caused and contained, to name a couple of her massive yet so-called 'miracles' for her would-be subjects.
Most unfortunate.
Meanwhile, the prophetic appointee alerted the two hunters.
"Brace yourselves, guys," he exclaimed, "The adversarial force is coming!"
It did not take long for his audience of two and many more to heed his warning. As they did so, the humans and the nearby Divine Presence could see a great essence of primordial power draw near from the horizon, taking the form of an immense and terrifying dark cloud.
The two necessary existents recognized this adversarial force instantly as none other than the Lesser Darkness. They then spotted ten powerful beings of created darkness who moved in front of the cloud, and recognized them for who they were: six Dark Archangels and four Dark Arch-Nephilim. Afterwards, they spotted a trailing yet immense host of lesser celestial soldiers of darkness, with all their ranks: Thrones, Dominations, Origins, Potentates, Principalities, Authorities, Incorporeal Powers, Virtues, and Regiments.
The younger of the two entities comforted himself with one small relief, for the religiously sensitive humans were neither panicking nor complaining to their prophetic guide. All of them determined without hesitation their preference for death over foreign worship.
The Darkness became impressed that God had commanded such unswerving loyalty.
Author's Note: The first inspiration for this fanfic, chronologically, is the fourteenth chapter of Exodus: the Red Sea account. As with previous fanfics, all Bible quotations found in future chapters come from the NJPS version, unless specified otherwise at the end.
"A great essence of primordial power draw near" is a tribute to Exodus 14:10.