User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-92.21.71.76-20130503181608

[SPOILER] Natsu and co. will go 500 yrs back in the past to stop Zeref from becoming immortal because currently Zeref is unstoppable and to stop Acnologia from ever existing. Zeref might know Natsu because he was 500 yrs in the past and that Natsu might have developed a friendship with him, and that when Zeref became immortal and was to strong to stop; Natsu vowed to become stronger in order to stop him and save him from the dark corruption but ended up dying saying that another me will defeat you; You can assume all this as a 'time paradox' that, that Natsu died in a different time plane different to the one where he killed Zeref. All in all that would explain why Zeref knows Natsu, Also Zeref is 'immortal' meaning he can not age or die.