User blog comment:Miskos3/Fairy Tail Chapter 483: Seven Stars, Review/@comment-109.176.129.254-20160428165201/@comment-24734624-20160508155029

No, think about it. If God Serena's Purgatory Dragon Flames are like those of Atlas Flame, Natsu could eat those. Natsu and Laxus could counter Sea King Dragon Slayer Magic with Lightning Flame Dragon Mode and Lightning Dragon Slayer Magic. Natsu could handle Gale Dragon Slayer Magic the way he did with Erigor's Wind Magic.

And of course Acnologia wouldn't leave without dealing with Natsu and/or Laxus. In fact, he'd probably come after the son of Igneel and torture him.