User blog comment:IamJakuhoRaikoben/Chapter 450: Alone in all the World, Review./@comment-5268982-20150831083317/@comment-9595671-20150831162211

In a way the One Magic is both light and Darkness. The light comes from love, but the darkness comes from tragedy. It was the love between Mavis and Zeref that caused the miracle that took Mavis' life.

Yet what confused me most is why only Mavis? What made it so that Zeref still survived? Being cursed by Ankhseram himself? The amount of time he's been alive, a stronger life force or just because Mavis hadn't eaten for a long time.