A blade coated with Necrophage oil inflicts increased damage on necrophages. Damage inflicted on necrophages is increased by 100%.
One user has reported that Necrophage oil is ineffective against drowners and drowned dead and though they might appear to be necrophages, they are not in fact included in that class, so this would make sense.
- This blade grease increases sword damage dealt to necrophages - i.e., all creatures that devour corpses. It is the most effective oil against monsters of this type.
- This oil is ineffective against humans and monsters other than necrophages.
Geralt already has the knowledge to create this at the beginning of the Prologue.