Disclaimer: I do not own Supernatural. I own only those original characters that are in this story.
Dark Comma
There are three who endure as, by far, the most powerful entities in existence. The oldest and strongest one was and is the original dark cloud. Next was and is the divine light. Beneath these two primordial siblings was and is a new dark essence whose human form's name was Sefira.
The first of these, the Darkness, had come into an agreement with the second of these, God, to create the third of these, the Lesser Darkness. It did not take long for the created one to entertain fancies of the three of them being triune, and especially to desire to replace the avuncular one as the object of mass prayer and veneration throughout the omniverse that was Creation itself.
Having proclaimed herself openly as the Active Divine Feminine, the third of these proceeded to cause into being many a dark creation, from intelligent beings with dark archangelic power to intelligent beings who lived on the physical plane to celestial beings in between. Included among these were the domains for these living beings, a domain of her own that was nothing less than the darkest domain in all of celestial existence, and an object that gave her ominous access to nigh-omnividence and nigh-omniaudience.
Meanwhile, there emerged celestial resistance to the dark proclamation, with its center in the Commonwealth of Heaven. With that resistance came completed upgrades of clear significance, upgrades in progress, and political discussions. The most powerful created being in existence, the ultimate object of the resistance, would have none of this, and resolved to impose severe restraint upon all her lesser opposition, in the form of adequate runes and spellwork crafted on their vessels.
She who arose in might then determined that manipulation and deception of the highest degree would be required to perform this great wonder. In order to deliver the manipulation and deception, in turn, she launched an unprovoked celestial assault against the heavenly realm itself, yet held back severely from a full-scale invasion.
Though there resulted no conquest of that abode, the angelic responses were predictable. The juncture had this arrived for the Lesser Darkness to entice her opponents into manufacturing their very own chains everlasting.
Author's Note: The title of this chapter and the first two paragraphs are inspired by the disputed Comma Johanneum, a corruptive Latin insertion of Trinitarian doctrine into the New Testament's 1 John 5:7.