Board Thread:Lore Discussion/@comment-68.45.229.57-20130720115140/@comment-7953253-20130905070656

Still unclear as to how Harkon's way of enacting the prophecy differs from the Dragonborn.

Sacrificing Serana, as in killing her? I don't see how that would have an impact or an effect.

One could only put so much blood on a single arrow. The Bloodcursed Arrows the Dragonborn uses are only tipped with Vampire Blood, but not completely soaked.

We'll never know.