An angel and a demon had an offspring, and for this unforgivable sin, both were destroyed.

The fruit of such an inconceivable relationship was named Al’i-se, and only by the intervention of a powerful wizard was she saved from the same terrible fate that had befallen her parents. Under the protection of the mage the child was taken to the world of humanity and hidden from the eyes of heaven and hell. Under his guidance she developed her skills.

As she grew up and became more skilled, it became clear to Al’i-se that her powers were far beyond anyone else’s, even those of the mage himself. Knowing that it was impossible to be detained, she escaped the control of her tutor and searched for the secrets of her origin, discovering the whole story and, finally, her parents sentence.

Seized with fury and an immeasurable desire for revenge, Al’i-se lost control. Releasing an unprecedented amount of strength, she ascended to heaven and descended to hell, destroying everything in her path. Neither angelic castes nor demonic hosts were a match for her and both dimensions collapsed at her ire.

There was, however, a side effect that she did not anticipate. Without the two opposing dimensions, the mortal world was swallowed up into nonexistence. Awaking from her blind fury, Al’i-se could only watch with absolute terror as her world was destroyed by her own actions and finally she understood why heaven and hell could not allow the union of an angel and a demon.

Consumed by pain and guilt, and deeply fearful of what catastrophes could befall if she used her powers again, Al’i decided to no longer interfere with existence and resigned herself to simply observe. For millennia she wandered. She travelled between universes and worlds, watching life thrive in some corners, and fail in others. She saw species, civilizations and entire systems rise and fall. It was the clash between these life forms that gave her a light and a hope of being rescued from the lethargy in which she had previously sunk.

Aware of the existence of other cosmic entities that wielded absolute power, Al’i-se idealized a competition which would take place in a dimension specifically constructed to contain it. This competition was created for amusement, but was also used to resolve conflicts between these almighty beings, without outcomes that would cause the obliteration of universes. A game, where those known as Eternals, would manifest armies of worlds in a strategic battle, without mass casualties. A tournament that, like them, would be eternal. Chess: Eternal Tournament.

For millennia, the goddess Simetra was fascinated with watching men and their growth as a species. For a divine being like her, every human act was curious, limited and banal, except for what men called feelings. It disconcerted her that such lowly beings could experience something so incomprehensible. In particular, one of these feelings aroused a deep interest in her: the one they called love. 

Simetra devoted her attention to it. She watched with confusion as the humans cried and smiled for it. She saw some engage in meaningless acts over it, while others lavished grandiose displays in the name of it. She saw people die for it, and live for it too. And as she sensed no rhyme or reason, it became clear to the goddess that this love of mankind gave them something she had never known: the drive to live.

She wanted above all to know this feeling. Her fascination was almost bitter with envy. She knew that it would not be possible for her to approach humans, by order of the pantheon, so she decided to give life to one herself. In her quest to create the most authentic human possible, Simetra analyzed humans for generations. She studied their cultures, traits, personalities, idiosyncracies, successes and failures. In her higher mind, she recorded every man and woman that lived, every moment of their lives, every tiny event, every tiny consequence.

And after all this, she was ready to create a man. Despite the gigantic amount of knowledge she had managed to accumulate, many attempts were unsuccessful. To the best of her powers, she was only able to create mechanical and empty echoes of a man, and disgusted, the goddess swept them from existence. Re-evaluating the information that Simetra had amassed, she finally realized the problem: the lack of free will and subjectivity. Determined, she finally created a man completely conscious and independent of her yet would choose to stay with her and love her. (i think you need to write something here about how the man isn’t going to age and that he’s going to live where she lives, and not on the human world)

Their new life together was an obviously rugged and time-consuming journey, since both man and goddess were faced with a completely new and unique scenario. Alongside Simetra, the man learned who he was and what his condition was. He saw how he was different yet contained the same capabilities as other humans. And with time, the coexistence of the two began to stabilize. Simetra, with all her divine wisdom, was no less challenged and this period was a profound learning event for her. She gradually learned how to relate to her partner, live with him and seduce him. And as it was natural, they loved each other, and both experienced happiness, side by side.

The human nature of her beloved was not long gone, however. More than a hundred years  passed and the immutability, constancy and stagnation of existence in the divine sphere began to affect the man, who felt a growing emptiness in his heart. Simetra’s existence was inherently prepared to withstand the infinity of times, but the man’s was not. Soon, her suffering matched his, as she watched him sink into apathy.The goddess devised strategies to cure his apathy, but they all proved useless in the long run. But one day, the man himself came up with a solution, one that she feared most of all. He asked to live among his fellow humans.

Simetra discovered at this moment a truth about love. That its greatest manifestation is the overcoming of its selfishness. So she took the man to live among his own. She chose a remote house in a small village, where only a couple and their daughter lived, so that he could get used to it little by little. Torn apart, she walked away.

The first contact was friendly, and soon the man was welcomed by the family. He lived there, while the goddess often visited him. He was happy, and Simetra was happy, but with each visit, he became increasingly distant from her. She felt him escaping from her arms, and the pain destroyed her with each return. When the couple’s daughter and the man found themselves in love with each other, they lay down together for the first time, and Simetra almost drowned herself in despair. Caught in a whirlwind of sadness and anger Simetra wanted to destroy them. She wanted to destroy everything, but she also knew that she would be unable to do so because it was the same love that had inflamed her. In the end, she decided to walk away, and forget. She tried, but failed, and returned to remain close to the man and as the only possible way, she accepted their relationship. 

In time, the relationship between man and woman bore fruit. It was a time of joy for both mortals, and after the months of pregnancy, twins were born. From joy, however, sadness emerged, as life abandoned the woman during childbirth. Simetra was unable to bear the man’s pain, and desperate to placate it, she resurrected the woman. This was a crime for the pantheon. The punishment was more severe than Simetra had imagined. Deprived of her divine status, she was cast down to earth and the man who was born of her divine essence withered and died. The twins, who owed part of their existence to the same essence, would follow the same fate, she knew.

There was one last hope, however. One last attempt that Simetra could make to save the lives of those children who were the legacy of her beloved. She left them in the care of their mother and set out on a journey to appeal to the forces that were the source of all the power of the gods and life in the universe. Light and Darkness.

Almost losing her own life in the endeavor, she finally found herself facing the original forces of her universe, which agreed to grant the request she had to make to them. That said, however, Simetra suddenly found herself with no requests. After all, what could she ask for? The life of her beloved could not be restored, for it was a manifestation of her divine grace incorrigibly lost. She couldn’t ask them to spare the twins’ lives, because how could she subject the children to the same torment of eternal existence, as she had done with the one she had created? Unhappy, Simetra just wished that the impersonal yet almighty Light and Darkness could feel the same love that she felt for the children of her beloved creation.

In this instant, Light and Darkness were overwhelmed by an absolute emotion. Not knowing what they felt, but desperate to save the lives of the two children, they merged with them. And the twins became Eternal.