Blessed Blood (Nephilim) Feat 5
Source Pathfinder Player Core
Your spilled blood is sanctified, with effects similar to those of Holy Water. Whenever a fiend, undead, or creature with a weakness to holy drinks your blood or deals piercing or slashing damage to you with jaws, fangs, or a similar attack, that creature takes 1d6 spirit damage with the holy trait. You gain a +4 circumstance bonus to Crafting checks to Craft holy water using your blood as one of the ingredients.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
NephilimA creature with this trait has the nephilim versatile heritage. Nephilim are planar scions descended from immortal beings from other planes. An ability with this trait can be used or selected only by nephilim.