Bloodline: All of the vampires descended, through Deliberate Transformation, from a specific Spontaneous Transformation.
“You’ve noticed that the vampires here all have slightly different abilities?”
I shook my head. “Except Mircalla. She can do some freaky shit.”
“Yes, well. Vampirism didn’t spring up from one isolated source. We all evolved slightly differently in different places, and there are different abilities and characteristics associated with each of these Lines.”
-Josephine and Grant – Black, Chapter 12