User blog comment:Sargenttacos115/Natsu and Gajeel age Theory/@comment-73.44.77.229-20141026014936/@comment-14.97.19.197-20141116151333

Well....It could also be that....Zeref once predicted that only a Fire Dragon Slayer could kill him...But He didnt know where that Fire Dragon Slayer is or is even born yet....Sometime He may have been wandering around the world He saw Igneel, The King Of Fire Dragons was traing Natsu his signature form of magic Fire Dragon Slayer Magic...Zeref discovered that Natsu was the Fire Dragon Slayer the only one who could kill him(zeref)....Since Natsu was young he wasnt strong enough to kill Zeref yet....So Zeref wandered off....Only to later found out that Natsu was a member of Fairy Tail guild....So he went to Tenroujima...The Holy Land Of Fairy Tail....hoping that Natsu would come there....There He met the spirit of Mavis.....and they grew close...(just maybe ;) )...After A long wait....the team tenrou came to the Island...SO When Zeref saw Natsu...He cried...SO that explains the tears....