Susanoo: Hiyusaki

Susanoo: Hiyusaki is Fukitsu's ultimate attack. By utilizing the freedom of hand seals provided by the demons that serve as her Susanoo's wings, they create the first two halves of the hand seals required by this attack. Within, Fukitsu creates the third. All combined, this transfers energy to the Susanoo's mouth in tremendous amounts, creating a bright blue sphere that seems to glow so brightly, it blinds those who look directly at it. Upon firing it, the sphere travels at incredible speeds. Upon contact with a target or object, the sphere shrinks down in size at a tremendous rate. Just as quickly as it shrinks, it expands so quickly that the heat generated from the friction incinerates anyone close to the area of impact. As it expands, it reaches a breaking point, exploding in a furious, blue firestorm, delivering devastating damage to anyone near the blast zone, which is extremely large, enough to raze entire forests to ashes. The technique comes with a significant drawback. Such a powerful technique puts an incredible drain on even Fukitsu's high chakra reserves, preventing her from doing anything else after that. She automatically passes out from the tremendous chakra loss, her Susanoo following suit. As such, it's meant to be used for ending a battle as quickly as possible rather than as a last resort.