Board Thread:Lore Discussion/@comment-68.45.229.57-20130720115140/@comment-13414245-20130904030727

If we look at the effect of the Bloodcursed Elven Arrows, the sun's blocked out for a day. Technically speaking, us using Auriel's Bow is practically fulfilling the prophecy. Kill Serana? Probably the only way Harkon could procure the blood without having any trouble with his daughter refusing. Finally, the whole "permanently blocking it out" could be taken as "being able to block it out without difficulty, thus allowing it to be constant and by interpretation permanent."