User blog comment:BlackWizardZeref/Fairy Tail Chapter 394: Juvia vs Keith Review/@comment-25244540-20140725085202/@comment-25244540-20140725092133

If he was sealed I bet he's just sealed in his book, like how Lullaby was sealed in its flute form.

Also we all know Natsu's scarf has some mysterious properties since it negated Zeref's death magic, if anything tried to possess Natsu it would probably end up in that scarf... *giggles* END with the body of a scarf, that's funny.