Succubus is an unlockable familiar added in the Afterbirth DLC.
- Flies around the room in a fashion similar to Cain's Other Eye and ???'s Soul with large dark aura that damages enemies inside it.
- Its dark aura will boost Isaac's damage by 1.5x when he stands in it.
- Succubus can be spawned by Cambion Conception. However, it will not increase Isaac's damage.