User blog comment:FairyRaven/Fairy Tail Chapter 465: 400 Years, Review and Commentary/@comment-114.108.214.205-20151209150638/@comment-61.1.39.75-20151209174822

Oh, true. Zeref hardly ranks anywhere near the top on that scale. For me, until we get more info on the guy, the title definitely goes to good ol' Acky.