User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-16281343-20150708064801/@comment-1359322-20150708071714

From this tweet:

"ファーブニルの台詞が帯になってますね. 本当の意味での龍王の姿、２０巻で見てやってください."

All i could get out of it is Fafnir's words/speeches are becoming an Obi. A true form of the Dragon King in actual sense, look forward to it in Volume 20.

So basically Fafnir became a sash?