HERB AND PLANT GUIDE Various Herbs & Uses (burned as incense) Angelica: prophetic dreams and visions. Anise: use just a little to repel nightmares. Bay Laurel: inspiration, repels negativity. Cedar: helps repel bad dreams. Cloves: use a small amount to retrieve buried memories. Hops: restful sleep and healing. Marjoram: relieves depression. Mugwort: visions and prophetic dreams. Mullein: repels bad dreams. Rosemary: use a little to avoid nightmares and visions. St. John's Wort: banishes spirits. Valerian: deep rest.