User blog comment:FairyRaven/Fairy Tail Chapter 400: Wings of Hope, Review and Commentary/@comment-112.198.79.120-20140913120035/@comment-9595671-20140913120344

Laxus while not actually saying it confirmed he does during the Chariot event he does have it with his word choice.

And I'm not sure its having the dragon inside them, remember Sting and Rogue's dragons are dead... unless this reaction with the slayers is proving otherwise