Trap the Soul Spell
D&D Description of the Trap the Soul Spell : Trap the soul forces a creature's life force (and its material body) into a gem. The gem holds the trapped entity indefinitely or until the gem is broken and the life force is released, which allows the material body to reform. If the trapped creature is a powerful creature from another plane it can be required to perform a service immediately upon being freed. Otherwise, the creature can go free once the gem imprisoning it is broken.
Depending on the version selected, the spell can be triggered in one of two ways.
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Note: Add a Reply about how you have applied the use of the Trap the Soul spell in a previous Dungeons & Dragons scenario.