To obtain the four diagrams that make up the Viper outfit, you must have just started Hearts of Stone Main Quest: Open Sesame (Part 1). Your initial objectives have you visit the Borsodi Auction House in Novigrad. After meeting Vimme Vivaldi, you have the optional objective to meet his three friends. The one that piques your interest is a lady of a certain age, and one that instantly recognizes your medallion. She is a keen collector of objects related to the witcherly profession.
Ask her where she developed this interest, and she mentions a happy past, but doesn’t elaborate. She does, however, allow you to view a selection of alchemy formulas, as well as four pieces of Viper gear. This is your only opportunity to purchase the following:
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Items: Diagram: Viper Armor, Diagram: Viper Boots, Diagram: Viper Gauntlets, Diagram: Viper Trousers |
After a chat about the auction, the Countess hopes you might use your preternatural abilities to locate a missing earring. Oblige, head up onto the exterior balcony, and examine a spilt wine goblet. You soon realize the Countess has an ulterior motive for asking you outside; she wishes to learn more about a man she once knew with tenderness; Vesemir. Answer her as you wish, and leave her to her melancholy thoughts.