Undead Companion Feat 5DhampirSource Ancestry Guide pg. 27Prerequisites an animal companion or a familiar
Your companion is also touched by undeath, a mix of a traditional companion and a skeleton, zombie, or stranger form of unlife. Your companion gains the
undead trait instead of the
animal trait and gains
negative healing. It otherwise uses the normal rules for an animal companion or familiar; that means it can still be affected by many conditions or effects to which most undead are immune.
Traits
Dhampir: A creature with this trait has the dhampir versatile heritage. These humanoids are the immortal offspring of vampires and members of other ancestries.