By manifesting mind trap, you place your psyche in a gem or large crystal (known as the mind trap), leaving your body lifeless. Then you can attempt to take control of a nearby body, forcing its psyche into the mind trap. You may move back to the trap (thereby returning the trapped psyche to its body) and attempt to possess another body. The spell ends when you send your psyche back to your own body, leaving the receptacle empty. You could choose to take over either a stronger or a weaker creature, but which particular stronger or weaker creature you attempt to possess is determined randomly.