User blog comment:Wrath022/Chapter 516: The Truth About Enchantment, Review/@comment-30338537-20170102184758/@comment-30338537-20170103154750

I'm confused about the whole Acnologia-eating-souls stuff. If he eats a Dragon's soul, how can said Dragon still be able to enter the body of a DS to prevent Dragonification, as Igneel & co have done? Even if their souls were only consumed shortly before entering a DS, there's still the thing of a soul being eaten a.k.a. gone, no matter how much time goes by, gone is gone, is what I would think. I've heard of Acno bathing in blood, but not of him eating souls. Of course, I may have misse dit somewhere, hence my confusion :(

Zirconis was also killed by Acnologia 400 years ago and his soul was still there for Wendy to summon. So not only was his soul not eaten, he also lasted 400 years. So in theory, Belserion should be able to linger that long as well. Not that it's likely that anyone's gonna cast Milky Way and even if it would be cast, only cheesy scenes will follow, so I'd rather not see it happening.