Ep. 9: Sesshomaru entra al inframundo para salvar a Rin y a Kohaku del Guardián

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Without his jewel shards, Koga leaves Inuyasha's group, taking Ginta and Hakkaku with him. Meanwhile, Sesshomaru visits his mother to strengthen the power of Meido Zangetsuha, so she summons a hellhound from her Meido Stone for her son to battle, which takes Kohaku and Rin into the void of the Underworld. Sesshomaru follows them into the void and defeats the hellhound to rescue them, but Kohaku later notices that Rin stops breathing. The darkness envelopes Rin, and Sesshomaru confronts the Guardian of the Underworld to rescue her. However, Sesshomaru sadly realizes that he cannot resurrect Rin, having already done so in the past. After purifying the corpses of the Underworld, Sesshormaru uses Meido Zangetsuha, this time a much wider pathway, back to the physical world. After Sesshomaru is scolded for thinking he could cheat death simply because he carries Tenseiga, the sword of Heaven, his mother revives Rin using her Meido Stone. Before Sesshomaru's group departs, Sesshomaru's mother warns Kohaku that even though his life has been unnaturally prolonged by his jewel shard, Tenseiga is still unable to save him from death. (Source: Wikipedia)