"Fars" is the persian name of Persia proper. "Farsun" in the days of Kull must be a precursor to Iranistan in the days of Conan. Iran is the homeland of zoroastrianism, the worship of the good god Ahura mazda. His archenemy is Ahriman,Lord of evil. "The heart of Ahriman" is a powerful amulet in the days of Conan. Indian/vendhyan "Asura" is the vedic indian form of "Ahura".
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