Igneel is killed. Acnologia is moderately injured. Igneel vs. Acnologia is a fight fought between the Fire Dragon King Igneel and the Dragon King Acnologia.

What really happened to Igneel?

Igneel is then hit by Acnologia's Dragon's Roar and is grievously wounded in the blast. Lying defeated and dying in a crater, Igneel listens to Natsu's tearful words of how much he has improved since his disappearance.

What episode does Igneel come back?

Tartaros Arc: The Fire Dragon's Iron Fist is the 258th episode of the Fairy Tail anime, and the 83rd episode of the 2014 series. As the two Dragons are in the midst of battle, Natsu interrupts their clash looking for reprieve from Igneel, who tasks him with retrieving the Book of E.N.D.