Missed out on becoming a vampire lord, can I still become one?

I never became a vampire lord, killed Harkon I think his name was, and cured Serana. Is there anyway I can become a vampire lord?

I'm playing on the Xbox 360.


Once you have defeated Lord Harkon and cured Serana of vampirism, there is no way to become a Vampire Lord (outside of PC-only console commands).