User blog comment:Miskos3/Fairy Tail 531: Pegasus vs. Black Dragon/@comment-6401212-20170415012307/@comment-6401212-20170415070715

I guess, but I thought he got the power up because of the book being opened and then right after that he activated Dragon Force. Also, Natsu's dragon force hasn't really gonna anywhere unlike the others. It's like he's never trained it.