Your holy water washes away falsehoods.
Benefit: Holy water you create through the use of the Blessed Waters feat can foil shapeshifters and those affected by deceptive magic. Any creature that takes damage from or that is within the splash radius of holy water you both created and threw is compelled to revert to its true form.
This affects beings affected by transmutation magic (such as alter self or gaseous form), by deceptive illusions (such as disguise self or invisibility), or by similar effects (at the GM’s discretion). This ability can even affect creatures using supernatural abilities, such as the change shape ability or a vampire’s gaseous form, though you take a –5 penalty on your dispel checks when attempting to dispel such abilities.
In general, any ability or spell that changes one creature into another or makes a creature look like something other than itself (or nothing at all) is affected.
An affected creature is subject to a dispel magic spell, targeting only these effects. If the creature is affected by magic that affects multiple creatures, the dispelling effect affects only the magic working upon that creature (not the entire spell). If the creature is not affected by a shape- changing ability or spell, the holy water affects it as normal. Unless your holy water provokes a transformation, this ability grants no insight into whether or not a creature is a shapeshifter.
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.