This power is most commonly used by Surgo Witches.
This ability allows users to come back together after being destroyed whether it be simply stabbed or even blown apart. The only beings shown with this ability in the books are Surgos, who can only be destroyed by dismembering their limbs, being burned, and buried. Otherwise, they will reconstitute. However, if their rings are removed, they will be rendered without this ability.
Another limitation to this ability is that if enough power or force is applied towards the person, they will be not be able to reconstitute regardless.