Crimson Lotus: Exploding Flame Blade

Crimson Lotus: Exploding Flame Blade (紅蓮・爆炎刃 Guren : Bakuenjin) is a Fire Dragon Slayer Magic Spell.

Description
User ignites his/her arms and generates long torrents of flames from them, which move to hit the enemy in a spiralling formation. Each connecting strike seems to generate a powerful, burning explosion; an even larger explosion was shown ending the barrage when Natsu Dragneel used the attack against Gildarts Clive. This spell has been described as the ultimate Dragon Slayer technique, said to be capable of "smashing through dragon's scales, crushing dragon's entrails and reaping dragon's souls". It was indeed enough to defeat a worn-out Laxus Dreyar, and even to cause Gildarts to take two steps back while subjected to it.