Smudge Stick
Smudging, or a rite involving the burning of sacred herbs or resins, is a ceremony practiced by many indigenous cultures. There are many varieties of rituals involving smoke, notably those that use smoke for spiritual cleansing or blessing, the purposes and particulars of the ceremonies, and the substances used, can vary widely among tribes, bands, and nations, and even more so among different world cultures. This particular smudge stick is a bundle of aromatic herbs that has been empowered by its spirit creator to ward off enemies and opposing spirits.
Item: consumable
Special Effect: single use, magic circle against alignment
Note: Smudge sticks could be created for a variety of unique single-use consumables, and given the theme of area purification (area effects) and seeing spirits, I would suggest the following effects can be used for different smudge sticks -- magic circle against alignment, sphere of invisibility, mass see invisibility, mass protection from curses, mass aid, and mass spell resistance (none of these are part of the druid spell list). As a side note, it might be neat to allow these to be crafted, using the various herbs/spices that players find in random loot.