User blog comment:FairyRaven/Fairy Tail Chapter 352: The Flame's Voice, Review and Commentary/@comment-7418318-20130920143429

With Atlas Flame really being the Eternal Flame, does that mean we can already rule out that the one who froze everything is a Human?

With Dragon's immunity to any non-Dragon or Dragon Slayer magic it'd have to be either a not yet introduced ice Dragon Slayer or some other non human being.

Or could it have been some artifact from the war 400 years ago that was created by the Dragon Slayers of old?