The World Born Dead
Vampiric Bloodline feat
Prerequisites: Living humanoid. Benefits: You gain the extraordinary Blood Drain ability and are considered to be a vampire for the purpose of spells and other effects, despite not being undead. Additionally, you gain a +2 racial bonus to climb checks, and the stealthy feat. Unfortunately, you can also be turned not commanded, destroyed, or rebuked. Special: You can only take this feat at first level. Blood Drain is considered an evil act.
Blood Drain (Ex): You can suck blood from a living victim with your fangs by making a successful grapple check. If you pin the foe, you drain blood, dealing 1d4 points of Constitution drain each round. On each such successful drain attack, you gain 5 temporary hit points.
Vampiric Alacrity feat
Prerequisites: Living humanoid, level 3 or higher, vampiric bloodline. Benefits: You gain fast movement 10, your strength increases by 1, and you gain a +2 bonus to Bluff, Diplomacy, Gather Information, Intimidate, and Perform checks made to interact with vampires.