Fog Cloud

You create a sphere of fog with a 20-foot radius, centered on a point in the spell’s range. The sphere scatters around corners, and its area is heavily obscured. It lasts for the spell’s duration or until a moderate wind (at least 10 miles per hour) or greater blows it away.

At Higher Levels. When you cast this spell using mana points equal to a spell of 2nd level or higher, the sphere’s radius increases by 20 feet for each level above 1st.