You create a 4-inch diameter orb of black mushroom spores at a point of your choice within range. Until the spell ends, a creature holding the orb can throw it like a mundane object of its size or break it as an action. If thrown, the orb breaks on contact with a creature or solid surface. When the orb is broken, a cloud of thick spores fills a 10-foot radius sphere around the point where it broke. The sphere spreads around corners, and its area is heavily obscured. The cloud lasts for 1 minute or until a wind of moderate or greater speed (at least 10 miles per hour) disperses it. The spell ends 1 minute after all the orbs created by it are broken.