Forktail spinal fluid is the name given to two quest items in The Witcher 3: Wild Hunt.
Forktail spinal fluid[]
Geralt harvests one bottle of forktail spinal fluid during the quest To Bait a Forktail.... The item is automatically added to the inventory during the dialogue with Eskel after killing the forktail.
Associated quest[]
Forktail spinal fluid[]
This bottle of forktail spinal fluid is used to make the Decoctions of the Grasses during the quest Va Fail, Elaine. It can be looted from a chest in Kaer Morhen, along with the other necessary ingredients, after Yennefer tells Geralt to brew the decoctions.