But if it's not, you can purchase this from a few merchants in the game. Gremist on Skellige mostly has it in stock and/or the merchant at the Bloody Baron’s castle. Just check their inventory to see if it's available. Besides Oils, you can make many other useful consumables through https://bookmarkproduct.com/story20196118/the-witcher-3-wild-hunt-op%C3%A7%C3%B5es