I don't understand the appeal of having Draco change his name from Malfoy to Black. When it comes to Pure Blood Supremacy, the Blacks are worse. Bellatrix was known as a devout Death Eater, Regulus died a Death Eater, Sirius died as someone who betrayed his friends and was sent to prison for killing muggles (we know this isn't true but the average wizard doesn't), Narcissa may not have been marked but she is loyal to her family's ideology. That's four out of the five children in family. Andromeda was disowned for marrying a muggleborn. The Blacks were a family of extremists and deviating from the family's beliefs got you disowned and burnt off the family tapestry.
What is it about the Blacks that should attract Draco to it long enough to discard his identity as a Malfoy? What principles, reputation or resources does the Blacks have over the Malfoys that would make identifying as a Black better for Draco, even after the war?













