User blog comment:FairyRaven/Fairy Tail Chapter 399: Wings of Despair, Review and Commentary/@comment-77.194.131.112-20140908094415

Acnologia appearing is not a surprise, Zeref told Hades that his evil actions attracted it, so we can think Tartarus' evil actions is the origin of its apparition.

Juvia who is awake, wasn't she poisonned by Keith ? Maybe Gajeel while absorbing the carbon absorbed the one in Juvia's body.

so Future Rogue's timeline is born, and we will see Acnologia destroying everything in Fiore, we can thunk Frosch will die soon.

Very good chapter