Appears in Harry Potter and the Dark Lord's Downfall. This article concerns the Harry Potter: The Dark Lord's Downfall version of Serefina Blackheart; you may be looking for other canon and fanon versions. Serefina Blackheart (b. 16th May, 1956) was a Pureblood witch. Born in Portugal to daughter of Elena and Jacob Blackheart. She is the mother to Aiden Chamberlain and adoptive mother and godmother to Phoebe Blackheart.