Fire Dragon's Iron Fist

is a Fire Dragon Slayer Magic Spell.

Description
An effective melee spell, in which the user engulfs his/her fist in flames and then punches his/her opponent, causing heavy blunt damage alongside burning. Such attack can seemingly be performed with both hands at once.

Trivia

 * Natsu Dragneel momentarily renamed this ability Cat Fire (猫ファイアー Neko Faiā) while wearing a cat mask taken from Millianna's collection.
 * Hiro Mashima said that this technique is Natsu's signature move.