User blog comment:Woest/Celestial Spirit King and Zeref/@comment-8153438-20131215082329/@comment-1359322-20131215094047

lol. Well i guess Zeref knows about the role given by Mashima to the four members consisting of Natsu, Lucy, Erza and Gray. Simply put:

Lucy, your role know it.

Gray, your clothes stripped it.

Erza, your plot armor wear it.

Natsu, your Nakama Power use it.