Before creation, there was intention, a will to be, a dream.
And when the first creature had his first thought, it also had a dream. When hope was born, people dreamed, when dread became, people had hope and dreamed of better days, when a universe died, existence itself dreamed of a new one.
Until, one day, the dream itself became alive.
The Dreamer, an ancient psych force born from the accumulate dreams and minds of infinite beings through infinite universes, but alas, The Dreamer was dream itself given form, it oculd not stay awake, it had to dream for every creature needed him to, for every dream came and was dreamed through him.
So he slept, and he dreamed, he dreamed of a world made of dreams, where every mind in every universe could come and go, to be free of pain and the burdern of existence.
This world would eventually be known as Dimension X, the ocean of infinity beneath councioness itself, where everything that came to be was once but a possibility, where every ending came to become something new. Everything that lived and that died would one day come from and come back there.
It was neither good nor bad, it simply was.
But every dream could become a nightmare.
The Nightmare, unlike The Dreamer who was born from hope, was born from fear, rage and loneliness from infinite beings, he wans't evil per se, but the bad aspect of life given form. He infected The Dreamer and his world, causing desolation through Dimension X, infecting dreams and creating creatures made from nightmares given form, all connected to him, the first nightmare.
Alas, The Dreamer could do nothing, for nightmares to end, The Dreamer had to stop dreaming, but to awake was to stop dreaming itself, destroying a pillar of creation and risk destroying countless universes and beings connected to him.
So he slept, and for every dream there would be a nightmare.
That was, until one day, a human boy entered Dimension X, not by dreaming, but by a rift in the dimension itself, with his own flesh and blood body. The Dreamer didn't worry, no normal creature could stay in there for long before being dragged back to home, Dimension X was a passage for every mind in the multiverse, never a place to be home to someone.
But, The Nightmare had other plans. It came to the boy with no solid form, and before The Dreamer could bring his back to his home world, The Nightmare infected the boy mind, creating a psychological link to him, for the first time it could now do what even The Dreamer could, it could live beyond the walls of Dimension X.
The boy name was Henry Creel.
Decades after, the boy would go to the city of Hawkings, Indiana, where he would use the powers gifted to him through The Nightmare, that would one day be known simple as The Mind Flayer, to main, torture and kill his own family, creating a psych wound in his dimension, as every time he used his powers, The Mind Flayer connection to him and his dimension became stronger, the walls between Dimension X and Earth tinning.
Decades after this happenings, a woman named Joyce Byers and her husband Lonnie where trying for a second baby, but alas, after years of trying, three miscarriages and pain, nothing came of it, until the stopped trying altogheter. Doctors couldn't definitely explain it, saying it could be hormonal imbalance, stress or even irregular ovulation. They gave her opitions, pill and experimental treatments, but alas the Byers could not afford it, and Joyce lost all hope, as the pain that the miscarriages and the guilt her husband Lonnie placed on her had already destroyed her emmotionally, her husband alcoholism only worsening the fact.
That was, until one day, Joyce Byers dreamed.
She dreamed of a boy with pale sking, dark hair and hazel eyes that reminded her of a forest on a raining day. The boy smiled at her and she reached for him, he called for her, "Mom!", his voice was so beautiful to Joyce, it was happy, full of optism, hope and that childish innocence she had long lost.
She woke up that night with a grin her face hadn't seen in months and, nine months later, William Byers was born.
Her beatiful dream.