User blog comment:FairyRaven/Fairy Tail Chapter 391: Gray vs. Silver, Review and Commentary/@comment-24784846-20140704210129/@comment-7418318-20140705174501

Apart from what FTGM just said, it's very comming in anime for villains to temporarily switch to third person for such remarks. "Feel the Terror of !" Optionally with a -sama attached for those that are really full of themselves.

He might also have picked up that habit from Mard Geer who always refers to himself in third person.