User blog comment:FairyRaven/Fairy Tail Chapter 336: In Order to Live Today to the Fullest, Review and Commentary/@comment-2214433-20130621095843/@comment-7418318-20130621132006

Let's just pretend that eating uncle Atlas' flames put Natsu into Dragon Force and some lazy assistant forgot to draw the scales onto Natsu, just like Sting's White Drive was forgotten in the anime, after he activated it.