Arctic Haze (EFA - A)

You create a 20-foot-radius sphere composed entirely of tiny, razor- sharp ice shards centered on a point within range. The cloud spreads around corners, and its area is heavily obscured. The cloud lingers in the air for the duration.

Each creature that is completely within the cloud at the start of its turn must make a Constitution saving throw or take 1d8 cold damage. In addition, on its turn, an affected creature's speed is halved, and it can use either an action or a bonus action, not both. A moderate wind (at least 10 miles per hour) disperses the cloud after 4 rounds. A strong wind (at least 20 miles per hour) disperses it after 1 round.