Erza and Mirajane visit Crawford, the former Magic Council chairman, and fall into Tartaros's trap. And in exchange for information on Tartaros, Doranbolt frees all the members of Oracion Seis!
You're right. The fate of the entire 
magic world is going to be on the line.
أنت محقّة. مصير عالم السّحر بأسره سيكون على المحك