Necrokin

From publisher blurb: Playing a necromancer not enough to scratch that undead itch? Try the necrokin. Necrokin, also known as “Necrosites” by researchers, are parasitic creatures that claim corpses as hosts. Taboos surrounding necromancy and undead have made it nearly impossible for them to integrate themselves into most societies. Each Necrokin is driven by the desire to make an identity for itself, no matter where that takes them. This species is compatible with 5e.