Your loathing of the undead is so great that your very essence is anathema to such creatures.
Benefit: Any creature that drains your vitality through the use of an ability like blood drain, energy drain, any ability score drain, or a similar effect must immediately attempt a Fortitude saving throw (DC = 10 + your total HD + your Charisma modifier) after its ability affects you. If the creature fails, it is nauseated for a number of rounds equal to half your total Hit Dice (minimum 1).
Additionally, you gain a +4 bonus on saving throws against spells such as magic jar, possession, and other abilities being used to possess your body, such as a ghost or dybbuk’s malevolence supernatural ability. This does not apply to mind-affecting effects—only to abilities wherein a creature tries to enter and control your body.
About Vampire Hunter Technique Feats
At their most basic level, vampire hunter technique feats are a mixture of fighting methods, disciplines, and stories passed down by vampire hunters successful enough to share their methods. Some are known battle tactics that fighters the world over have shared. Others meld magic and finesse to grant mortals an edge over the undead. The most dangerous invite the corruption of the undead into the hunter, allowing him to turn vampires’ powers and tools against them. The strangest rely on mysteries of the old world and possibly even those beyond to confound creatures who think themselves immortal.
Vampire hunter technique feats can only be accessed by members of the vampire hunter class or those who have the Vampire Hunter Tradition feat (or a similar ability). Unless such a feat specifically says otherwise, other characters cannot choose these feats, even if they meet the prerequisites.
Pathfinder Roleplaying Game: The World of Vampire Hunter D © 2016, Paizo Inc.; Author: F. Wesley Schneider.