Fairy Tail 436 focus’ largely on Zeref’s past, he tells us a story to how he studied magic, only to discover that a curse was placed on him giving him contradictory powers, all while trying to bring back his brother back, Natsu Dragneel! Zeref reveals that the form of Natsu is actually Zeref’s little brother body which he made using Etherias. Zeref and Acnologia meet while Acnologia stands there in his human form!