Effects: A blade coated with this substance causes increased damage to all types of vampires.

Preparation: The oil is made by mixing ingredients providing one measure each of vitriol, vermilion and hydragenum, and two measures of quebrith; high-quality grease must be used as a base.

Duration: Long

Whosoever seeks to destroy a vampire, to banish it from this world forever, should prepare St. Gregory's Oil, called Vampire Oil by witchers. No fleder or bruxa can withstand it.