When Harry Potter was born he was the child of Severus Snape and Tom Riddle. But for unknown reasons they left him with the Potter family that could only care for him for a year before they died in a fire. Though Harry survived and was taken to stay with the Dursleys.
Harry hated them and one day he let his anger out and all this power came out of his body and he went crazy. Eventually at age 11 before he went to Hogwarts he killed the Dursleys. (Harry knew about Hogwarts in this au)
After that he left and teleporting to his true father's. The they were pleased to see Harry but they knew something was off.
After Harry explained they went shopping for school supplies and then got ready to leave early for H I gear's the next day.
Harry was sorted into Slytherin and became one of the most feared villians after his dad of course.
Hi it's not good yes but it sounded great as it is 11 at night but I hope you enjoyed.