User blog comment:EvanDude345rv5/Fairy Tail 356: Tartarus Arc Prologue/@comment-82.20.156.238-20131020170057

Silver didn't defeat an actual dragon, he just froze the remnants of its soul.

And I wonder how they'll deal with E.N.D. It would be stupid if Natsu, the whole Fairy Tail guild or even another guild alliance defeated it, a demon that even Igneel couldn't beat.

If anything, this should be the point when Acnologia returns and fucks shit up further.(I say this assuming the whole Tartarus arc will last about a year or something) I would say Zeref but then that would just be a rehash of the end of the Tenroujima Arc with Zeref OHKOing Hades.

I'm guessing this arc will be the longest yet and I think (or rather I hope) Mashima executes this correctly because it has the potential to be the best arc.