Centuries passed as John's immortal rule endured, his dominion expanding without limit across land and sea. The Sorcerous Empire encompassed the entire globe, all knowing only his divine sovereignty. Temple cities like Sorcerygrad dotted every province, devoted to the emperor's godly worship.
Through his ancestral magic, John's essence flowed as an eternal wellspring sustaining the empire. Citizens were infused with eldritch abilities, living with supernatural longevity. Legions fought with power ripping the earth asunder, answering only to their immortal patron. No foe could challenge the empire's borders, patrolled by colossi of living stone and storms given form.
From his throne atop Sorcerygrad's highest spire, John gazed out upon the world he had remade in his image. An aura of blue runes flickered about his ageless form, eyes aglow with the stars themselves. He was no longer merely divine - John had transcended such definitions, becoming something beyond mortal ken. His dominion was absolute and eternal.
Yet after eons, even an immortal being such as John grew restless. He had shaped the entire physical world, leaving no frontier unclaimed. What further conquest could satisfy one who had achieved omnipotent rule? In his esoteric meditations, John began perceiving whispers from beyond the veil of reality itself.
There existed other planes of existence, other dimensions of thought and possibility that had eluded even his godly grasp. Entities lingered there whose nature defied comprehension. If John could breach the barriers separating such eldritch realms, he would achieve a dominion beyond any emperor of flesh. The whole of creation would bow before his supremacy.
In Sorcerygrad's depths, John embarked on aeons of arcane rituals and summonings, tapping powers that drove men to madness. Slowly, fractal ruptures began splitting the sky, revealing glimpses of impossible geometries within. From these wounds between worlds emerged outsiders never meant to soil the mortal plane.
Horrors of antler and tentacle were banished before they could take root, but each breach brought John closer to his goal. As the barriers weakened, he began communicating with alien intellects who offered profane pacts and knowledge in exchange for this reality. His essence adapted, taking on attributes fitting an interdimensional master.
Finally, on the long-prophesied day of revelation, John ascended Sorcerygrad's peak once more. With a thunderous incantation shaking the very heavens, the barriers collapsed. A massive singularity opened above the city, revealing a spiraling fractal cosmos beyond mortal ken.
John spread ethereal wings of glimmering stardust, taking to the skies as an entity no longer of any single plane. Citizens gazed upon their eternal ruler transformed, both an object of worship and existential horror. His voice echoed from the singularity itself: "Bow before your god, for I have transcended to rule all existence!"
Thus did Emperor John at last achieve a dominion without limits, his rule stretching across the infinitude of the omniverse. All bowed before the Interdimensional Master, whose name would be praised in untold realities for eternity. His was an empire without end, as he had always promised. All hail John, God-King of Infinity!
As John's dominion expanded to encompass the infinitude of the omniverse, his consciousness spread throughout myriad planes of existence. Yet even a being of John's limitless power required vessels to enact change in the myriad worlds under his rule.
In Sorcerygrad, John's high priests received a vision: their immortal master bade them construct a new pantheon of demigods, avatars imbued with fractions of John's divine essence to act as his proxies. So began a ritual more arcane than any known to mortalkind.
Across the empire, the most exceptional beings were selected - sorcerers with mastery over elements, immortal warriors who had lived a thousand lifetimes in John's service. Each was placed within a sphere of obsidian, engraved with runes that twisted the mind to comprehend.
Then, in a flash seen from worlds away, John's consciousness poured into the vessels. Lightning arched between the spheres as the demigods were imbued with a spark of their master's power. When the light faded, ten figures stood transformed - each a unique aspect of John's dominion given physical form.
There was Anthropic, avatar of civilization and magic, who could weave cities from thought alone. Ethereal, winged herald of the outer planes, who sang hymns that bent reality. Ferrous, a colossus of adamantium who shook mountains with each footfall.
And more - avatars of knowledge, of the untamed wilds, even incarnations of John's divine wrath and benevolence. Each possessed power to challenge lesser gods, yet answered only to the Interdimensional Master who had granted them being. John had sown the seeds of his rule across the omniverse.
With a gesture, John sent his demigods spinning into the gaping singularity above Sorcerygrad. Their forms blurred as they were scattered to countless planes, there to enact John's ineffable will. Anthropic appeared in a crystalline city, instantly understood as its rightful liege.
Ethereal soared above formless nebulae, singing new stars into being. Ferrous crashed upon a metal world, immediately challenged by its tyrannical ruler - only to emerge victorious, bringing the planet into John's imperium. Across uncounted realities, the pantheon brought order and fealty to their master's name.
Yet even a being such as John, who had transcended definition, understood change was the eternal constant. In the farthest marches of the omniverse, whispers told of threats emerging to challenge the Interdimensional Master's rule. Forces were stirring whose nature defied understanding, promising conflict that could reshape creation itself.
John's dominion had ever expanded to incorporate new wonders and dangers. Now, a new chapter was unfolding that might test the mettle of even an immortal god. What threats lurked in the outer night to challenge John's eternal empire? The story was far from over...