User blog comment:BlackWizardZeref/The Origins of Fairy Tail/@comment-8153438-20131012233915

Maybe Zeref and Mavis are related to each other.. I believe Mavis is also from 400 years ago like Robaul who created Cait Shelter.. Robaul's task is finished so he's gone. Mavis continues to exist, maybe because of Lumen Histoire..