VAMPIRIC BITE
Prerequisites: Bite attack, and undead, revenant or carnivorous.
Benefit: Your bite attack deals an additional 1d6 bleed damage to victims that are flat-footed, grappled, helpless, or pinned (stacks with Vampiric feat). When you deal bleed damage with a bite attack, you gain temporary hit points equal to half the bleed damage dealt that last for up to 1 hour or until depleted. Remember, temporary hit points from multiple sources (including multiple bites) don't stack.