The Four Trials of Belle

This is a fairy tale told by human adults to their children. It teaches them to avoid the temptation of becoming a Supernatural to get "cool" powers, because those powers actually have many undesirable consequences.

Summary

Belle was a 10 year-old human girl who was very curious about the world. One day, she decided to go out and explore the land around her.
She arrived first at the Northern Continent, where the vampires lived. She saw that vampires could fly, lived ten times more than humans, and had funny-looking teeth and she decided she wanted to be a vampire too. She got her wish, and at first she liked being a vampire. But then she learned she had to drink blood to survive, she could no longer taste the foods she loved, and she would never be able to feel the sun on her skin again.
Belle regretted her decision. She prayed to become human again, and the world took pity on her. Belle became human again.
Next, Belle arrived at the Eastern Continent and saw the witches. They did nice tricks, could turn things into other things, and lived twice as much as a human. They didn't need to drink blood and they could be out in the sunlight, so Belle decided she wanted to be a witch. She got her wish, and at first she liked being a witch. But then she learned that not all spells worked, and that she could die if she cast too many spells, or be killed by a spell gone wrong.
Belle regretted her decision. She prayed to become human again, and the world took pity on her. Belle became human again.
Next, Belle arrived at the Southern Continent, where she saw the fairies. They spoke with plants, made beautiful gardens, and had beautiful glowing wings. Their magic couldn't go wrong, be overused, or kill its caster, so Belle decided she wanted to be a fairy. She got her wish, and at first she liked being a fairy. But then she learned that fairies hibernate in the winter and cannot eat meat, which meant Belle would never see snow again, and would never be able to eat her favourite food.
Belle regretted her decision. She prayed to become human again, and the world took pity on her. Belle became human again.
Next, Belle arrived at the Western Continent, where she saw the werewolves. They turned into a monstrous form what could run faster than the wind, bite through metal, and smell a sugar cube in a tropical storm. They needed even less sleep than humans, and they fed almost entirely on meat, so Belle decided she wanted to be a werewolf. She got her wish, and at first she liked being a werewolf. But then she learned werewolves were only in the bestial form while the full moon shone in the sky, and the transformation was painful and took a huge toll on her body.
Belle regretted her decision. She prayed to become human again, and the world took pity on her. Belle became human again.
Belle returned home to the Central Islands, wiser and assured that there was nothing else she would rather be than her perfect human self.

Spread

The Four Trails of Belle has spread to human children around the world. Supernatural children know it too, as it is often used against them to prove how their powers are not as "special" or "cool" as they seem.

Variations & Mutation

Some variations of the story have Belle meet with shape-shifters and even ghosts.