you were a high school girl in the 2000s you died because of a shooter and your soul got trapped in the school and you were stuck as a ghost

You usually floated around the school and the school became abandoned because there were complaints about creepy noises from Locker 666- your old locker where your dead body was stuffed in the locker

As years past magic came into the world... And you missed it in a mold rotting covered school

There was heros , demons, magic and more it was 9042