User blog comment:IamJakuhoRaikoben/Chapter 433 & 434: Ikusatsunagi & Demolition Fist, Review./@comment-24546844-20150512162617/@comment-2214433-20150512182203

Hades' power was mostly thanks to his heart, he'd get owned by Lightning Flame Dragon Roar otherwise. So even at that time, Natsu was capable of increasing his power to higher levels than Hades. Current Natsu goes without question