User blog comment:Miskos3/Fairy Tail 539: World Destruction, Review/@comment-5840892-20170611192727

At least now we have the potential to see Aconologia defeated in a way that won't be absolute bullshit. By devouring time magic like this, Hiro could rationalize his loss due to amount of rabid aging and degeneration it causes the dragon to experience, thus giving him a massive near unbeatable power up that doubles back and nerfs him to killable.

Or something like that, I cannot articulate this well.