Immortal Chaos Brigade

is a Noble Phantasm used by Fuuma Kotarou. Rather than being Fuuma Kotaro's Noble Phantasm specifically, it is more appropriate to call it the Noble Phantasm of the Fuma Ninja Corps. 
It summons his 200 subordinates as spiritual bodies, automatically turns the surroundings of the enemy group into darkness, and throw them into a hell of agonizing cries. Kotarou's favored attack using the Immortal Chaso Brigade is to circle around his foe and use his pyrokinesis to create a tornado around them.
The Noble Phantasm is based of one of the raid tactics used by Kotarou. Together with 200 thugs, the Fuuma Kotaro that was employed by the infiltrated into the encampment of the army and indiscriminately murdered wounded soldiers, plundered weapons and provisions, and dumped fire here and there while raising war cries. Those night raids that continued every day and night forced the Takeda army into retreat.
==References==
Category:Noble Phantasms
Category:Anti-Army Noble Phantasms
Category:B rank Noble Phantasms
Category:B+ rank Noble Phantasms
Category:Summon Noble Phantasms
Category:Noble Phantasms introduced in Fate/Grand Order