User blog comment:Omega natsu2/Chapter 354: Ephialtes, Predictions./@comment-10197002-20130927234053

I'll make an unofficial Fairy Tail prediction because I think this will happen but I don't think it will happen next chapter. Tartarus' guild mark looks like two keys and Cobra and Doriate have both said things about opening the gates to hell so I'm going to guess that the Nine Ghost Gate is nine mages looking for keys to open what they call Hell, whatever that may be :)