User blog comment:Miskos3/Fairy Tail Chapter 488: The Two of Us, Always, Review/@comment-5303512-20160606223507

I think there is some misinterpretation of Bradman's usage of the term "Underworld", that can be a metaphor for killing your enemies, Gajeel stated that his body was becoming nothing but Magic Particles, that thing he was sucked into may as well do just that.