Rather than think of the heavenly super space, or heavenly plane, as another alternate reality or universe, one would do better to think of it as a layer of existence that ran along the upper edge of all other realities and universes.
The layer of foam at, or at least near, the top of the cosmic sea. This was where the gods lived, this was the perch from which the angels watched the worlds, and the demons schemed to destroy. This was the abode of all those, whose power made them incompatible for mundane reality.
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Instead of mundane clouds, the heavenly realm held floating isles. Masses of solid mist that had somehow starting taking on stone, soil and silt from the lands below. On three of those floating isles were three separate castles, sprawling structures made of stone and steel.
At the center of each of these castles was a tree. Majestic arboreal existences with pale white bark and dark gray leaves, with each tree being large for one to hang moons from even their smallest branches. On the top branch of each of these trees sat a lone figure, a youth, dressed in denim breeches and a light cotton tunic.
Dark hair, dark skin, dark eyes, and a face that was pretty enough to leave the youth’s gender somewhat ambiguous.
Billy frowned as he looked down at the realm below. He was in the curious and unenviable position, of having things go better than he had hoped and worse than most could deal with, at the same time.
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When a being naturally ascended to the heavenly plane, that generally meant it had reached a level of power that had taken it above the mortal realms. What he’d done was circumvent that and the millenia of research and cultivation that would have normally been involved.
His tower functioning like a match, that burnt away all the space around it till there was nothing except it and heavenly plane. Creating a propulsion effect that was akin to a rocket that moved the universe instead of itself and whatever it was mounted to.
Naturally there were costs to this. By cheating the system he was going against the order of things. They all were, which meant divine calamity would befall them all. Bolts of heavenly thunders and soul scourging storms of flame always came when anything transitioned between the mortal planes and heavenly planes.
A problem that was crudely remedied with Billy acting as living lightning rod, taking on the energetic reaction with the power of his cultivation base and the natural durability of his aged soul.
*****
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Though they were drifting farther and farther apart, the castles were still close enough for Billy to hear their echoing bellows. This was the sound of two of his alternate selves leaping from their tree branch. Their bodies shifting into the mammoth form of a Grand Nidhoggr, a multiheaded, undulating serpent with a infinite number of heads.
The heavenly plane itself barely noticed them, but the regions that they were attacking shook as they landed. The great beasts tearing into whatever prey had garnered their attention. The night repeatedly flashing into day as beams of light and nothingness were spat out at unseen targets.
The bellowing continued, accompanied by baleful shrieks and groans from the earth as the Nidhoggr turned their sights on the realm itself. Using their planet-sized teeth to tear away chunks of reality and engulfing the spaces within whole, before returning to their respective fortresses. Continuing their journey across the wide expanses of the heavenly plane.
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Shortly after the BTC made their way into the heavenly Billy reconfigured the tower into three fortresses. Another reason why he’d had to create the tower at all was, because it was only the way to safely transition into the new plane with his inner-world in tow. Doing so plainly would have made far more noise than he wanted.
Bringing the attention of certain beings that he was no state to deal with, if things got nasty. He would have explained this if anyone present had asked, but unfortunately, aside from him, none of the people of Bone Tree Company were in any state to be asking questions.
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Mana, Prana, Soul Force, Spirit, Chi, ki, essence, aura, Aether, these were just a few of the quote unquote magical particles present in the various universe. As a group they were called boolean particles, or more specifically lesser-boolean particles. Energetic particles that were especially reactive to will or sentient intent.
Boolean particles were also called subjective particles, because the realities they entailed changed according to one’s thoughts and point of view.
Though how reactive they were and how they operated varied from world to world, they generally shared three key traits.
First, all lesser-boolean particles, had a tendency to act on evolutionary instinct, affecting life on a base level. Second, active interaction with boolean-particles would tend to result in anomalous effects, i.e. powers or spells. Third, a continually increasing concentration of Boolean particles would in time, bring a mundane object or individual, into an anomalous state.
In the heavenly plane. There were no boolean particles here, there was no aether on the heavenly plane.Instead of having all anomalous activity hinging around a few key particles the whole plane operated on boolean principles. With everything being made of raw power and thought.
Any consistency within the heavenly plane was created by the concentrate wills of the various unfathomable entities who presided over the given territories of the plane and the plane itself which was alive in its own fashion, presiding above them all.
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The problem with having an entire plane made of subjective, or boolean particles, was that life required objectivity. Certain things needed to stay the same, regardless of state of mind, belief or desire, for regular existence to be possible. Consciousness required resistance to existence, in much the same way endoskeleton possessing lifeforms required gravity to keep their natural forms.
Without that necessary resistance, things start to fall out of place. Entering states of vagueness that muddled the matters of life and death, and being and non-being. Forcing one into a place where the body was irrelevant and the profundities of the soul took hold.
A precarious state of self-impregnation, that all ascended beings had to go through either directly after, or directly before, their migration between the planes. Where the old self and all the trappings of mortality would have to be shed, in a very painful and onerous process that could require decades or even centuries to complete.
Failure to survive this process, would result in dissolution of one’s soul, but success would result in endless life and unlimited possibilities.
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Billy created three more duplicates, and had them leap down, tearing into the world below. Gathering more of it to bring back and refine. He would watch over his people and guide them into their new state of being. He would guard their souls and feed them the energies they’d need to successfully complete the change.