This is a story bearing on the everlasting struggle for world supremacy fought between the powers of two things: Technology & Magic
Millions of years ago, the Earth blew up into a hundred atomic fireballs. The blasts were caused by five terrorists that wanted to take over the Earth.
It took a few million years for the radiation to clear the skies and allow the sun to appear in the sky. By then, there were only little of humans left on the Earth. Most of humanity was turned into mutants that lived in the badlands that were radioactive that allowed them to never become human like they were in the past and every birth became a new disaster. Not only were the humans changed into mutants, but horses did too. There are a species that called themselves changelings. Unlike the horses from millions of years ago, these changelings look bug-like and can fly as quickly as hawks. They had teeth that are as sharp as knives; this species also has an ability to shape shift. The K-9s were mutated as well; they could walk on two legs and have the brain of a human.
In the good lands however, there were ponies and other good creatures that arose from their long slumber. Pegasi are ponies with wings that can soar the skies like a bird and unicorns that have horns which produce magic.
One day in Equestria, it was a happy day; Harmony, queen of the Equestria, was having a party celebrating three thousand years of peace. However, during the celebration, Harmony felt a pull from the sky. She looked up and saw dark clouds forming all around from every direction. She then fell into a trance and left the party up to her castle that was standing on a high hill. The residents were very puzzled to why she would go into her castle without saying a word. Suddenly, the residents began to feel a pulse that told them to follow her.
Harmony was alone inside the castle without any guards or servants to bother her. Outside the castle where the residents stood, the storm grew until thunder struck the land. The eldest resident, Starswirl, was brave enough to enter the castle to see the queen. As he entered her chambers, he saw Harmony lying on her bed holding a pair of twins within her hooves. As Starswirl got a closer look at the infants, he realized they were no ordinary ponies; they were magical alicorns. The infants were polarized like magnets. One that that had an attracting kinetic draw; the other was repelling and impossible to get near.
Celestia, the kind and thoughtful alicorn, spend most of her childhood entertaining her mother with neat tricks and visions.
Chrysalis, the changeling-like alicorn, would never visit her mother and spends most of his time torturing small animals and getting into conflicts.
Many years have passed and Harmony's life continued to slip. Soon, all life drained out of her as Celestia held her hoof, trying desperately to restore her. She cradled her mother within her hooves and wept.
Chrysalis however heard the news and was excited for that she could try and take over leadership of Equestria. When Celestia confronted Chrysalis, she was full of rage. It was a furious battle as they fought each other with their magic. They continued until they nearly destroyed each other, but Celestia's magic was stronger because she was enraged over the loss of her mother. Chrysalis was defeated.
"You'll pay for this," said Chrysalis as she limped herself up," the day will come, sister! Just wait and see! I'll return and make all of Equestria a place where mutants, changelings, and demons rule!"
Chrysalis headed away towards the badlands, leaving Celestia very concerned.