1 hour/catalyst
As an action, you can create this bomb. As an action, a creature can throw this bomb at a point within 5 meters, where it explodes on impact. Fog spreads to fill a sphere twice as big as normal for the duration. The sphere spreads around corners, and its area is heavily obscured. It lasts for the duration or until a wind of moderate or greater speed (at least 15 kilometers per hour) disperses it.