Blood Suck
You have a bite attack that uses a trait of your choice and deals d8 damage in melee range. When you attack a creature with your fangs, you don't damage their health; you damage their stress and gain an equal amount of stress in return. If the amount of stress you gain exceeds your stress maximum, the overflow goes into your HP. With a consenting creature, you can trade your stress for theirs as you give them a blood transfusion. You cannot gain stress or HP from rests.
The damage increases to d10 at tier 2, d12 at tier 3, and d20 at tier 4.