The Black Death Catacombs Quiddity Seed Ingot Purification

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Black Death Catacombs Quiddity Ingot: You allow Hoshino Kei to examine your Quiddity Ingot. Hoshino Kei tells you, "This ingot is attuned to the power of Isparian potential. The being it is most similar to is Queen Elysa. I have heard the story of how a female voice was involved in the quest, though my theory is that it was the voice of the long-dead Olthoi Queen which helped to break the spell." Hoshino Kei tells you, "It seems that Queen Elysa's fate shall forever be intertwined with the Olthoi. As such, the Olthoi may prove to be a means to purify this ingot. Scouts in the Olthoi North have reported a newly-discovered cavern of Olthoi - there may be a sufficient means of purification there." Hoshino Kei tells you, "This cavern is not located in a dangerous place. I would advise seeking a vassal, perhaps, who might be willing to perform this task for you."