Long before 'the battle of Hogwarts' the school had plenty of problems, even while the founders themselves still walked the castle halls. In a time where knights gathered around round tables, and exalted wizards stood like titans, witness the day of Hogwarts' greatest loss.
By the end of the first wizarding war, the Black family was a shadow of its former self. Orion Dead; Regulus Dead; Sirius imprisoned; Cygnus a distant widower with his daughters apprehended, disowned, and married off respectively. All that was left was an ailing old witch, a distraught house-elf,... and Regulus's daughter. Leonis Black. Could she help the Black family rise again?