In the END

Spoilers through chapter 413 (Ep259 29 of ft2014). During the war with Tartarus, Face activates, and Natsu is revealed to be END. Lucy's quick thinking and use of the one magic saves him, but many in the guild are left devastated and scarred by the cost of the war. Not only that, but there are signs on the horizon of a new war, one that could end up being the downfall of Fairy Tail