Fog Cloud

1st-Level Conjuration
Casting Time: 1 action
Range: 120 feet
Components: VS
Duration: (C) 1 hour

You create a 20-foot-radius sphere of fog 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 2nd level or higher, the radius of the fog increases by 20 feet for each slot level above 1st.

Source: PHB 243, SRD

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