Assuming the victim's SR is overcome and they fail their save, are they basically helpless when their soul is entrapped? I would think so since it is a Level 8 spell - so, I assume the victim cannot plane shift or teleport out?
here is the text from the SRD:
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.
here is the text from the SRD:
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.