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

Why is it that, to acheive the effect of blotting out the sun, Harkon needs to kill Serana for her blood to make bloodcursed arrows while we need simply ask her for them & she remains alive (or, well, undead)? When we use a bloodcursed arrow on the sun, are we not fulfilling the prophecy ourselves? 