When creating your oil, it is fairly simple; the main difference is made in whether your herb is dried or fresh. In general, you should assume that dried herbs have a higher concentration of their properties because there is no residual moisture. Fill your vessel with fresh herb or half fill for dried. Add your preferred carrier oil - we love olive oil for mugwort because of it's connection to Greek and Roman Deities Artemis and Diana, respectively. Make sure that you remove air bubbles around the herb with a tooth pick or stem. Allow your oil to sit in a warm spot (if this isn't your altar, that's ok! we like doing ours in the kitchen) for 1-6 full moon cycles (depending on potency) before use. If storing for longer term, follow the above steps but after the warming period, place it in a cool, dry, dark spot for 3-6 months.