Everything is Relative

After Voldemort's resurrection, Sirius decides to remove the blood wards from the Dursleys', only to realise that they were not only blood wards. Only years later would they understand who and why someone tampered with the wards as well as with people's magic. Completely AU, partly OOC, Dumbledore bashing. Rating just to be sure. Pairings not decided yet. Requests are welcome.