Yu Yu Hakusho (1992)

S4E15 Love and War

During the upcoming tournament match, Hiei faces off against his old ally, Mukuro. However, Mukuro has delved into the dark secrets of Hiei's past and is aware of his desire for vengeance. Will this knowledge provide the unusual, bound fighter with the upper hand? In a desperate move, Hiei readies his most powerful attack: the Dragon of the Darkness Flame!