User blog comment:CNBA3/Fairy Tail 411 Review/@comment-1359322-20141201102857/@comment-77.194.131.90-20141201105617

Natsu gained access to DF through his anger, like Saiyens goes on super saiyan mode, nothing else, this is the power of feelings, just like how Lucy manage to use 3 keys at the same time she used her feelings to power up, Natsu and Lucy inconsciously used the one magic