Powder
A bag of powder contains powdered chalk, flour, or similar materials. In addition to other uses for powder, it can be handy while adventuring to help pinpoint invisible creatures. You can throw the powder into an adjacent square as an Interact action. If there's a creature in that square, it becomes temporarily Observed until the end of your turn, though the creature still has Concealment due to invisibility. The powder quickly falls away or becomes invisible itself, preventing you from tracking the creature indefinitely.
Traits
An item with this trait can be used only once. Unless stated otherwise, it's destroyed after activation. Consumable items include alchemical items and magical consumables such as scrolls and talismans. When a character creates consumable items, they can make them in batches of four.