Black Future is the 524th chapter of Hiro Mashima's Fairy Tail. Immediately upon his arrival, Acnologia defiles Irene's corpse as recompense for her creating Dragon Slayers. Meanwhile, as Zeref and Natsu fight, the former asks the latter to die so that humanity can be saved, Gildarts and Cana continue to struggle against August, who wonders what Gildarts would feel if his daughter were to die in front of him.