This jutsu starts of as a simple ring of fire that can be expelled from the mouth using your hands, the trick is that the intention of this attack is not to burn the opponent but to explode into them relasing the hot energy of fire on to them at great speeds. This attack can not be extingusished by water based attacks as the speed from which is fired will allow it to pentrate water. It can be have its momentum impeded if the attack matches the Halos speeds and velocity. It can be fire at single shot or fired in succesion, it is more useful when fired in a single shot