Blood Mist

You cause the blood of all creatures within a 30-foot-radius to turn to mist causing 2d10 hit points of damage. Creatures that make a Constitution saving throw receive on half damage. This creates a 30-foot-radius sphere of bloodied mist centered on a point within range. The sphere spreads around corners, and its area 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.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d10 and the radius of the fog increases by 20 feet for each slot level above 1st.