The character draws the soul from a newly dead body and
imprison it in a gem. The subject must have been dead no more
than 1 round per caster level. The soul, once trapped in the gem,
cannot be returned through clone, raise dead, reincarnation,
resurrection, true resurrection, or even a miracle or a wish.
Only by destroying the gem or dispelling the spell on the gem can
one free the soul (which is then still dead).