Tansy is a great herb to use in spell work. One of tansy magical properties is invisibility. Perfect to get rid of the annoying person that just won't go away. Why not become invisible to them so they can't see you? this is the perfect herb for that. 

Other Magical properties:

• Protection: Wards off evil, spirits, and authority figures (police/courts); excellent for travel protection.
• Immortality & Rebirth: Linked to Greek myth (Ganymede), it's used in rituals for death/rebirth cycles, Ostara, and longevity.
• Cleansing: Used to cleanse ritual spaces and banish negativity.
• Spirits: Helps guide the dead; used in funeral rites and embalming (historically).
• Fertility/Abortion: Historically used for both, but highly toxic; modern practitioners avoid internal use.
• Deities: Associated with Zeus, Hebe, Mary, and darker aspects of Venus.
• Elemental/Astrology: Water element; associated with Gemin