User blog comment:IamJakuhoRaikoben/Chapter 250: Zeref Awakens, Review./@comment-4412309-20110911041047/@comment-2106167-20110912122144

Yup, I noted that. He/she or someone else also edited the Dragon Slayers page adding Zeref as an Old Style, Dark Dragon Slayer taught by the Black Dragon.

...

Must be a result of my enormous charisma... xD