User blog comment:FairyRaven/Fairy Tail Chapter 414: Drops of Fire, Review and Commentary/@comment-4489126-20150105180942/@comment-7418318-20150105194128

I hope Gray's line will turn out to be a bad translation by MP, because right now it really does look very stupid.

If it was worded just a bit different, it could be interpreted about Gray being astonished or outraged about Zeref just sniffing out a sentient creature he himself created like it was nothing "But he's your own creation, isn't he?" might work out well for example.

I can see why you'd have problems with the long-term goal of Natsu disappearing, but on the other hand now the entire guild has two common goals together (Zeref and Acnologia), so that might still work out alright.

Too bad we didn't get to see more of the battle, so that we could see the tide turning slower instead of such a "Bleach move".