The Demise of Harry Potter - The Glory of Cassius Black

What if Sirius didn’t let Harry be taken to Dursleys? What if Sirius had gone to his parents for help? What if Potters were not Harry’s father? What if Harry had been raised as a proper pureblood? ————— ”To whom gets a hold on this letter, My name is Regulus Arcturus Black.” “If you’re reading this, that means I am dead.” “I don’t know when you’re reading this or who you are.” “The boy people have come to know as “Harry Potter” is my son.” “His birth name is Cassius Regulus Black.”

This is my first time ever attempting to write a fanfiction. I am not confident in myself and I may not even finish this. So, please don’t take this that seriously. I can’t have a fixed seclude either since I am an high school student and have tons of homework.Anyway, if y’all have an idea, want correct me on something or want to suggest something please feel free to do so. All of them would be appreciated. Also, English is not my first language so if there are mistakes you can point out those too.