I think it is deeper than being merely about vampires...it is about grasping the 'left handed' path/satanism/olde religion/etc. The line "And let me loose, I fear I've finally found a way" sounds like 'and let me, lucifer, I've finally found the way'. No longer fearing, rather, fully embracing and accepting a path of darkness(not unlike 'career of evil')
I think it is deeper than being merely about vampires...it is about grasping the 'left handed' path/satanism/olde religion/etc. The line "And let me loose, I fear I've finally found a way" sounds like 'and let me, lucifer, I've finally found the way'. No longer fearing, rather, fully embracing and accepting a path of darkness(not unlike 'career of evil')