The story of Etherious Natsu Dragneel

Yury Dreyar, Son of Laxus and Mirajane, when he was born he had put Fairy Tail in a war and Suddenly Acnologia appears and Natsu fights him to his last breath after sealing him and telling something he dies. But 17 years later he returns not as a friend, not as a family but as an enemy.