Maou Gokuenha

Maou Gokuenha (魔王獄炎波 lit. Devil Prison Flame Wave): Takeshi can use this technique without his blade, but prefers it as an extension. Holding his sword wth both hands while closing his eyes to concentrate, he begins storing energy. When he opens his eyes, he charges up a field of dark energy. He rises into the air and slams the ground with his sword, causing pillars of fire to rise from the ground and incinerate the foe.