A long time ago, a new land was formed by a magical, beautiful Goddess named Lei. She, having the ability to travel through other universes, had recently left a universe where a book series named Harry Potter existed. During her stay in that universe, she read all seven books, falling in love with every single character and storyline. She decided that the world of Hogwarts needed to exist somewhere, so she used her almighty powers to track down a blank slate, a universe without anything in it. She'd only heard rumors of such universes existing, but still she searched for a long time, floating through random universe after random universe. But finally, after what felt like an eternity, she found an entire expanse of white. Lei had found her blank slate. Slowly she crafted a mighty never-ending ocean, a beautiful blue sky, and three Islands. She named the largest island Hogwartia, and upon it she crafted a gigantic castle, much like the one from the Harry Potter books. She named it Hogwarts Castle, obviously, and around it she built an entire village.
Lei lived for many months in solitude, proudly relaxing in the world she had created. But she soon grew lonely, and developed the need for company. Lei wanted people, mortal humans, to share her utopia with. She knew what had to be done to do such a thing, and because of her growing loneliness she was willing to pay the price. Using her powers, Lei tore her immortal soul into two halves. She took half of her fractured soul, and broke it into hundreds of tinier pieces. She then threw the pieces down upon the village, where they quickly transformed into physical beings: Humans. The loss of half her soul weakened her severely, but she didn't care. No longer would she be lonely, and now Hogwartia would not go to waste on just herself.