FRIEND OR FOE? Mavis manages to successfully escape, and Fairy Tail renews their resolve to take back their guild! Meanwhile, a mighty change has been boiling up inside of Natsu's body--his demonic power has awakened. The power threatens to transform Natsu's will, and he makes his way towards Zeref--until one man stops him in his tracks! The icy Gray Fullbuster is determined to kill E.N.D., locking the two comrades in a brutal battle that threatens their very existences.