User blog comment:FairyRaven/Fairy Tail Chapter 416: Tartarus Arc: Final Part, Review and Commentary/@comment-7418318-20150119154525/@comment-7418318-20150119184644

Now that you mention it... Acnologia ripped off Gildarts arm (among other things) and now he got his own arm ripped off.

Sounds a little like poetic justice ^^