This technique is a senjutsu altered version of the Fire Release: Flame Bullet. The user fills their mouth cavity with oil, created inside his body with senjutsu chakra. This oil is expelled and at the same time ignited, creating a massive flame, equivalent in power to a multitude of Flame Bullets. The flames can be used as a single projectile or a continuous stream of flames. With a single bullet, Jiraiya was able to instantly incinerate Nagato's Giant Drill-Beaked Bird.
When used in a closed off area, the flames produced can completely cut off the front escape route of an enemy cornered in a hallway or room, while thoroughly engulfing each other routes.