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Viper School Armor and Venomous Swords – The Witcher 3: Hearts of Stone
Though the base game had two Viper School swords, the Hearts of Stone expansion introduced the Viper School Armor set and venomous swords. The armor diagrams can only be found in the “Open Sesame!” quest when purchased from Countess Mignole. The Viper Venomous Steel Sword diagram is found in Borsodi Vault but the Venomous Silver Sword itself requires exploring Gaunter O’Dimm’s world during the “Whatsoever a Man Soweth”. Miss it and it’s gone.
