Geralt begins the game with four of these. The formula can be bought from Fioravanti in Flotsam. Journal Entry Arachnid Oil is a universal formula that is effective against any creature susceptible to poison. Simply apply it to a blade, wound your opponent, and wait for the poison to take effect. The oil is ineffective against creatures resistant to poisons. Retrieved from "https://witcher.fandom.com/wiki/Arachnid_oil?oldid=509366" Categories: The Witcher 2 oils Languages: Deutsch Français Italiano Русский Community content is available under CC-BY-SA unless otherwise noted.