User blog comment:Omega natsu2/Chapter 354: Ephialtes, Predictions./@comment-4489126-20130930201508/@comment-5303512-20130930202717

Ephialtes is also a translation for Nightmare, so I believe that it will probably pertain to Gray's past, Team Natsu will be greeted and given hospitality in the sun village, they stay one night, Gray has a bad dream about his childhood and remembers his parents especially his father.