This spell functions like raise awoken undead, except that you are able to perfectly unite a soul with their undead form. The undead vessel the soul will be occupying has reduced requirements compared to raise awoken undead, which are described below. Any body parts missing from the subject's new undead body will be recreated by this spell. The subject can have been dead no longer than 10 years per caster level.
Upon completion of the spell, the subject is immediately restored to full hit points, vigor, and health, with no loss of prepared spells. However, the subject loses one level, or 2 points of Constitution if the subject was 1st level. (If this reduction would bring its Con to 0 or lower, it can’t be resurrected). This level loss or Constitution loss cannot be repaired by any means.
Constructs, elementals, and outsiders can’t be raised. However, this spell is fully capable of bringing back a subject who has died of old age.
Skeleton, Revenant, Ghost, or Ghoul
Creating a skeleton, revenant, ghost, or ghoul via this spell only requires an intact skull or head with similar properties to the subject's original body.
Mummy
Raising a mummy via this spell shares the same requirement as the previously listed types of undead. However, if the mummy's original heart has been destroyed, a new heart from a creature similar to the subject will need to be prepared. The spell will change the heart to be a new version of the subject's former one.
Necropolitan
Raising a Necropolitan only requires an intact skull or head from the subject's previous body, or from another dead Necropolitan.
* - (Gemstones worth at least 5,000 gp, which must be placed in the eye socket (or eye sockets) of the corpse you intend to bind a soul to. Gemstones used are disintegrated in the process.)