The Art of the Inferno (火炎龍の術, Kaen Ryu no Jutsu; "Art of Flame Dragon") is a recurring ninpo art used by Ryu Hayabusa. It can be bought from Muramasa in Ninja Gaiden, while he gives it to Ryu in chapter 2 of Ninja Gaiden: Dragon Sword. In Ninja Gaiden 2, it is found in chapter 1 inside a chest within a shrine after the first few parts of the chapter. If not found, like the other items, it can be bought later from Muramasa. It is also used by Ryu Hayabusa in Warriors Orochi 3.