Vampire Level 1 Transformation Boon: Undead Form

Your Dexterity Score permanently increases by 2, and your Charisma Score permanently increases by 1. (Ability Scores cannot be increased beyond 20 in this way.) You also gain the Undead sub-type in addition to your other creature type(s).

Additionally, if you are reduced to 0 HP and would normally die, you instead fall unconscious and any healing you receive immediately stabilizes you, raising you to 1 HP but you remain unconscious for the next 1 minute. You also cannot die from age, starvation, thirst, or suffocation.