Soul Bind
You draw the soul from a newly dead body and imprison it in a black sapphire gem.
This material is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.
Necromancy
Level Cleric 9, Sorcerer/Wizard 9
Components V, S, F
Casting Time 1 standard action
Range Close (25 ft. + 5 ft./2 levels)
Target Corpse
Duration Permanent
Saving Throw Will negates
Spell Resistance No
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).
Focus A black sapphire of at least 1,000 gp value for every Hit Die possessed by the creature whose soul is to be bound. If the gem is not valuable enough, it shatters when the binding is attempted. (While creatures have no concept of level or Hit Dice as such, the value of the gem needed to trap an individual can be researched. Remember that this value can change over time as creatures gain more Hit Dice.)