Grenade, Gas

When detonated, a gas grenade creates a 10-foot-radius sphere of poisonous gas. A creature that enters the cloud for the first time on a turn, or that starts its turn inside the cloud, makes a Constitution saving throw. Creatures that don’t need to breathe automatically succeed on the saving throw. On a failure, the creature is poisoned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. The gas spreads around corners, and its area is heavily obscured. It lasts for 1 minute or until dispersed by a moderate wind (at least 10 miles per hour).