Freezing Fog

Potion, rare

As an action, you can throw this flask of bright blue liquid up to 20 feet. The flask shatters on impact, Creating a cloud of freezing fog in a 15-foot-radius sphere. The cloud’s area is heavily obscured, and the cloud remains for 1 minute or until dispersed.

At the start of each of its turns, a creature in the cloud must make a DC 13 Constitution saving throw, taking 2d6 cold damage and suffering the restrained condition on a failed save. Creatures who succeed on the save take half damage and are not restrained.