Desiccating Dust

Wondrous item, uncommon

This small pouch contains fine, pale sand that radiates faint necromantic energy. As an action, you can sprinkle this dust over an area up to 10 feet square. All non-magical plants in the area immediately wither and die. Water in the area, up to 10 gallons, evaporates instantly. The pouch contains enough dust for 3 uses.