User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-4495710-20111015155753

It's kind of crazy but I think that Zeref could actually be Natsu's Father..I mean Natsu Couldn't get past Freed spell so he must be over 80 years old..If Zeref is also a dragon slayer then it is possible that he also hasn't age at all..And (i'm not sure about that) zeref said at some point that he expected Natsu to beat him and stop him..So who would know better about Natsu's ful potential if not his father..