The Vampire Fang(吸血の牙,Kyūketsu no Kiba?), also known as Vampyr Fang, is a recurring offensive item in the Final Fantasy series. It is usually dropped by vampire-like enemies and its effects are related to the Drain spell.
"The fang of a blood-sucking bat. Even removed, it quickly absorbs blood, turning a bright red."
The Vampyr Fang is a loot obtained by stealing it from the Great Tortoise (loot 4), or by completing the missions Showdown and Otherworldly Visitors. It is needed in order to create the Ebon Blade, Soulsaber, Diabolique, Kain's Lance, Heretic Rod, Death Claws, and Ice Shield.