You imprison an adjacent creature in a tree, a boulder, or another solid natural object. The subject must be helpless or willing, and the object you imprison it inside must be larger than it. Your Nature check determines the maximum level of the subject. The subject remains imprisoned until you choose to discharge the ritual or until you die. In addition, you must take a personal effect from the subject and hide it or carry it with you. If the personal effect is brought to the subject's location, the subject can be released.