Ep. 8: Hiei retiene a Keiko como rehén con la Espada Sombra, obligando a Yusuke a luchar contra él por el antídoto.

The last thief, Hiei, who possesses the Shadow Sword: an artifact that has the power to turn any human it strikes into the lowest level of the demon class, has taken Keiko hostage in order to get both the Orb of Baast and the Forlorn Hope from Yusuke. Making matters worse, Yusuke and Botan are shocked to learn that Hiei had struck Keiko with the Shadow Sword and that she's slowly turning into a demon, which causes Botan to use her own spiritual power to prevent this from happening. Yusuke realizes that he must quickly defeat Hiei so that he can get the antidote needed to stop the transformation, which is currently sealed from within the hilt of the Shadow Sword. Hiei use the Jagan eye, affording him additional perception, which, in turn, presents Yusuke a battle much too difficult. Kurama steps in to assist Yusuke and to help Botan prevent Keiko from becoming a demon. Yusuke manages to trick Hiei by firing his spirit gun off the Forlorn Hope in order to hit Hiei in his blind spot, defeating him. The artifacts are taken back to the Spirit World, and Keiko reverts back to normal thanks to the antidote. (Source: Wikipedia)

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