User blog comment:Zelron/Soul of the Dragon (Why the soul gotta be black?)/@comment-4057437-20121015220735

We killed a Dragon using the Dawnguard Rune Axe and its count of undead didn't change. Assuming the (Ancient) Dragon was ressurrected by Alduin, we thought it possible it would count as undead, but it didn't.  (As currently smithed, with two pieces of  enchanted apparal and the character's skill level and perks it does 375 damage.)