User blog:Royice/Theory on how Zeref know Natsu

So here is my theory, when Igneel tried to destroy Zeref's book E.N.D and failed he told Zeref of his son who will one day be able to defeat him.Now you may be asking how did Igneel know of Natsu 400 years in the past? Well when Natsu meets Atlas, and befriends him; Natsu tells Atlas he is Igneel's son, so when Atlas goes back in time in my Theory Atlas tells Igneel of Natsu and how strong he is and how he may even become stronger. So then soon after Igneel fights or some how confronts Zeref and informs him. any thoughts on my theory?