You have a taste for blood. Moreover, you have to drink blood to survive.

MP Value: 1

Drawback: You must drain a pint of blood from a living creature ever 24 hours. Doing so is an attack action, and you can only drain blood from a willing, helpless, or dying (but not dead) creature. The bitten creature takes normal damage from the bite attack plus 1d6 extra points from the blood loss.

If you go 24 hours without consuming blood, you take 1d4 points of constitution damage. Drinking a pint of blood cures the damage taken for blood deprivation in 1d6 rounds. Ability damage caused by blood deprivation cannot be healed by normal healing.

Special: You must have a natural bite attack to take this drawback.