Balazar's Freezing Mist

You create a 20-foot-radius sphere of mist centered on a point within range. The sphere spreads around corners, the first 5 feet are lightly obscured and the rest is heavily obscured. It lasts for the duration or until a wind of moderate or greater speed (at least 10 miles per hour) disperses it. Objects and creatures within the mist take 1d6 cold damage at the start of your turn. A creature must make a CON save or have their movement reduced by 10 feet each turn it stays within the mist.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the radius of the mist increases by 20 feet and deals 1d6 additional cold damage for each slot level above 1st.