Crimson Lotus: Phoenix Blade

Hidden Fire Form: Crimson Lotus: Phoenix Blade (滅竜奥義　"不知火型"　紅蓮鳳凰剣 Metsu Ryū Ōgi "Shiranui Gata" Guren Hōō Ken) is a Fire Dragon Slayer Magic Spell.

Description
While in Dragon Force mode, the user covers his/her entire body with the golden fire granted by the Flame of Rebuke and then propels himself/herself against the opponent at incredible speed, leaving behind a long wake of flames and hitting the target with a devastating headbutt. This unstoppable and destructive spell was used to defeat Zero and destroy one of Nirvana's leg powered Lacrima.